Changes: Structure

Every specific group of blocks purposefully formed in Minecraft based on coding is part of a natural structure.

The Overworld

The Overworld contains numerous generated structures, at a wide variety of scales.

Terrain

Biomes dictate the shape and height of the world. At this stage, the ground is made mostly of stone and stone variants, with water filling in most empty spaces below layer 63, with exception for structures.

Mountain

Mountains are hills with extreme slopes and cliffs. Mountains can sometimes have caves through them. On an amplified world, mountains are extremely common in all biomes except ocean and swamp biomes.

• 

  A picture of an extreme hills biome

• 

  A large overhang, occasionally found in extreme hills biomes

• 

  A mountain overhang with a floating island

Floating "island"

Floating "islands" are structures that float in midair that are not connected to the ground, the sea, hills or cliffs. Floating "islands" are normally just random pieces of floating dirt and stone found near cliffs, but on rare occasions they can be large, floating structures that even have springs and trees on them. Floating Islands are most frequently found in the extreme hills, ice plains, ice mountains and mushroom island biomes, but can be found anywhere. Floating Islands are very common in an amplified world.

• 

  It is rare to see a naturally occurring, large, floating "island"

• 

  A Large Floating "Island"

Hollows

Hollows are the opposite of floating islands. They look like caves, but they have nothing to do with cave generation (although they may intersect with them). When there are many overhangs, they close together and create a hollow. They have exactly the same floor as the terrain above, depending on the biome that they are located in, unlike caves. Hollows have no specific floor. Grass can generate inside too, and interestingly will survive without light. When they generate under the sea level, they are filled with water. They are extremely rare in the default world, but can be found far more commonly in certain customized worlds.

• 

  A hollow in a customized world.

• 

  Another hollow connected to a cave.

Hill

Hills are randomly generated pieces of land in the map. Like stairs, hills are always traversable to their lowest point by virtue of the algorithm which generates them; there is almost always a place on each level from where the next level can be accessed, meaning that the player can climb a hill one level at a time until they reach the top. Cases where this is not true are rare.

• 

  A randomly-generated hill with some tall grass and trees.

Beach

Beaches usually generate next to oceans and cover all nearby shorelines. They come in two different varieties: sand beach and stone beach. Sandstone is located below sand in sand beaches. Stone beaches are usually steep cliffs that lead straight into the water.

• 

  Beach with a large pond in it

• 

  Vines creeping down beach with a mini-jungle

• 

  A mushroom biome next to a beach

• Oceanfront Mountains.png

  A stone beach with steep cliffs

Surface

Surface layer

The uppermost layers of the terrain are converted to a biome-dependent material: usually grass blocks and dirt, or sand in deserts and beaches. Podzol is found in mega taiga, mycelium in mushroom island biomes, and red sand is found in the mesa biome. Gravel is generated under sand.

Basin

Occasionally, instead of being converted to dirt or sand, the top layer is stripped away, leaving a 'basin' of bare stone. They bear some resemblance to a geological 'shield' (an area of tectonically stable rock that has been exposed to prolonged erosion due to its very old age; it is distinct from the geological term "basin"). They seem to be more common in forest or plains, and are occasionally seen filled with water. Commonly, minerals can be found in these, generally coal ore and iron ore. If generated in a Mesa biome, gold ore can also be seen.

• Biomes Basin.png

  A naturally generated basin landform

Water bodies

Ocean

Oceans/Seas are huge bodies of water with every single water tile being a source block. The ground can rise high enough to produce small, relatively barren islands.

• 1.13 Biomes Ocean.png

  A picture of an ocean biome

• DeepOcean.png

  A deep ocean, with an ocean monument in the background.

River

Rivers are long "strands" of water that cut through or separate biomes. They do not have a current. Patches of sand and gravel are seen commonly dotting the banks of the rivers, and clay settled at the very bottom. In some cases, rivers will generate higher than normal, producing a dry riverbed, sometimes with occasional small water patches.

• 

  The first image of a river released by Notch.

• 
• 

  A narrow river.

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  A river that splits off into two rivers.

• 

  A frozen river in a cold biome.

Lake

Lakes are small bodies of liquid. Water lakes, which are small pools of water springs, can generate above sea level or inside caverns. They can also generate isolated underground, connected to no other structures whatsoever. When in a winter biome, these small lakes are never initially frozen but will turn to ice if exposed. The lakes can also be composed of lava; however, lakes of lava are much rarer. Lava lakes found at the surface are surrounded by stone (which can be replaced by ore veins such as dirt, gravel and coal). Both types of lake generate with a small air pocket above them, which may result in floating sand, floating snow cover or even the top 2/3rds of trees above the lake. Lava lakes may cause trees to burn away.

• 

  A lake in a plains biome.

• 

  A lake in a taiga biome, which is freezing

• Mesa Lava Lake.png

  A lava lake in a mesa biome

• 

  A waterfall naturally generated on top of a lava lake, turning it into obsidian.

Large structures

Cavern

Caverns are caves and tunnels that are automatically generated under the ground in various places, composed of primarily stone and ores. In 1.13‌^[upcoming], caves are able to generate in ocean biomes.

• 

  A dark cave with a zombie

• 

  A large underground cavern. A tree grew with the light provided by the lava.

• 

  A circular cavern that generated exposed to the sky.

• 

  A cave that generated in an ocean.

Ravine

Ravines are tall, long cracks of air, usually measuring around 30 to 50 blocks in height, 84 to 112 blocks long and no more than 7 blocks wide. Ravines can have small ledges along the top. They can be found at levels 20 to 68, sometimes appearing on the world surface or underwater, forming canyons and trenches. They can go very deep underground, sometimes spawning slimes or exposing diamond ore. If they reach deep enough, they may also be floored by the lava lakes at level 11. In the Amplified world type, ravines can reach from surface level to bedrock. A ravine can be cut in half by water, separating the ravine into two parts that is abrupty stop with a wall of stone near the water. Ravines can also be found in oceans or rivers having a waterfall from the river/ocean falling into them. In 1.13, ravines can spawn in the ocean making it look like underwater trenches.‌^{[upcoming: Lua error in Module:Version_link at line 112: attempt to concatenate local 'text' (a nil value).]}

Ravines can connect to caves, dungeons, abandoned mineshafts, and any other generated structures. Due to the large surface area of their walls, ravines often have water and/or lava flowing down them (from springs in the walls, underground lakes, or even openings to the sea).

In Bedrock Edition, ravines almost always go all the way down to bedrock, which causes lava to generate at the bottom. Obsidian often forms at the bottom as water sources flow down into the lava.

• 

  Two ravines joined together underground

• 

  A ravine that is open to the sky

• 

  A ravine generated under another ravine

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  Two ravines open to the sky that generated next to each other, with a River biome between them.

• 

  An underwater ravine in 1.13.

• 

  Another instance of an underwater ravine.

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  A ravine that exposed a Mineshaft.

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  A ravine that has been cut through by an ocean.

Abandoned mineshaft

Abandoned mineshafts are structures generated underground (partially above ground in mesa biomes) which consist of branching mining tunnels with wooden supports and broken rails passing through it. They are the only places where cave spider spawners and minecarts with chests can be found naturally.

• 

  An abandoned mineshaft with wooden bridges crossing over a ravine.

• AbandonedMineshaftRoom.png

  A large cubic dirt room found in a mineshaft.

• 

  An exposed mineshaft in a mesa biome.

• 

  A mineshaft that is packed to due probably intersecting itself or another one.

Stronghold

Strongholds are underground structures made up of stone bricks, monster eggs, and iron bars. They consist of many rooms, most notably libraries and end portal rooms. Although they are very rare, they can be found much easier by using an eye of ender.

• 

  The end portal room located within a stronghold.

• 

  A pillar room in a stronghold, intersecting with other tunnels, notice that one of them is a dead end.

• 

  A library inside a stronghold.

Small structures

The quantity of most of these features (aside from dungeons, mineral veins, and springs) is biome-dependent; not all features can be found in every biome.

Dungeon

Dungeons are small, mostly underground, one-room spaces bordered by moss stone and cobblestone, and typically contain chests with rare items, and a monster spawner in the center, which will spawn zombies, skeletons, or spiders.

• 

  A dungeon with a monster spawner in the center, and two chests. The torch was placed by the player.

• 

  A desert dungeon, exposed to the surface, and mostly covered with sand.

• 

  The loot found in a dungeon chest.

Mineral vein

A mineral vein is a natural deposit of ores. Players can come across these veins in caverns or anywhere where there is natural stone. Underground deposits of dirt and gravel are generated in this step, followed by the more precious ores: coal, iron, gold, redstone, diamond, emerald (in extreme hill biomes) and lapis lazuli. They can only form in stone, and do not replace each other or any other block. However, there is one exception: other ores can replace andesite, diorite and granite. Note that two or more mineral veins can form next to each other and make it look like a mineral vein made of more than one material.

• MultipleOreVeins.png

  Multiple ores generated above an underground lava lake.

• 

  A coal vein generated underwater.

• Oreveinmultiples.png

  Multiple ore veins in a cave. Diamond ore and redstone ore as well as coal ore and gold ore are visible in the distance.

Tree

Trees are common structures created both during world generation and by players (grown from saplings). They are made of wood and leaves, and in Bedrock Edition and Legacy Console Edition, might have vines or mushrooms (as dying trees and fallen trees respectively).

• 

  A variety of tree types: From left to right, oak, birch, spruce, and jungle

• 

  A snowy spruce forest on the right.

• 

  Two types of giant trees

Huge mushroom

Huge mushrooms are structures made up by mushroom blocks in the shape of a mushroom. They naturally generated in mushroom islands, swamplands‌^{[Bedrock Edition only]}, and roofed forests, and will also generate if the player uses bone meal on a mushroom.

• 

  Red and brown huge mushrooms seen on a mushroom island

• RoofedForest.png

  Huge mushrooms generated in a roofed forest biome

Spring

Springs are randomly generated blocks of either lava or water that act as a source of their respective material. While both can be found on the vertical side of stone blocks above the surface, lava springs are more often found underground beneath layer 32 in caverns and mineshafts. They do not generate above a certain Y altitude.

• 

  A water spring falls from a cliff

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  A lava spring fall from a mountain side

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  A double lava stream fall (The tree fire is on the left.)

Desert well

These well-like structures built of sandstone blocks and slabs generate only in the desert biome. They have a 1/1000 chance to be generated in any desert chunk, which makes them a rare sight. It is possible for a well to generate around a cactus. The well structure will still generate with the "Generate Structures" option disabled. In Bedrock Edition, it is common to find two desert wells spawning in the same chunk.

• 

  The well structure

• 

  The well structure found near a caved-in dungeon

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  Two wells that are separated by a hill.

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  A well "buried" into the sand.

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  An excavated well

Moss stone boulder

These structures are meant to represent boulders, made entirely of moss stone. The arrangement of these structures varies greatly. They can be found dotted around areas of the Mega Taiga biome. Moss stone boulders are quite rare, due to the mega taiga biome's rarity.

• Mega Taiga.png

  The first image of the mega taiga featuring moss stone boulders.

• Moss Stone boulder in a ravine.png

  A moss stone boulder generated in a ravine.

• Moss Stone boulder in a beach.png

  Many moss stone boulders in water.

Ice spike

Ice spikes are tall spires made of packed ice that can only be found in the ice plains biomes. There are two variants of ice spikes: one is short and thick, and the other is extremely tall and thin.

• 

  An ice plains largely covered by ice spikes. Both types of ice spikes are visible.

• 

  A small group containing only short spikes.

Fossil

Fossils represent the remains of giant extinct creatures, and are composed of bone blocks, with random blocks removed and some of them replaced with coal ore. They were made with NBT structure block format and they have NBT files of different types of fossils in minecraft.jar/assets/minecraft/structures/fossils‌^[upcoming] (minecraft.jar/data/minecraft/structures/fossils‌^{[upcoming: Lua error in Module:Version_link at line 112: attempt to concatenate local 'text' (a nil value).]}). Fossils randomly generate 15-24 blocks (i.e. at y coordinates ranging from 40 to 49) below the surface in deserts and swamplands, including the "Hills" and "M" variants. Each chunk has a ¹⁄₆₄ chance to generate a fossil. They may generate as one of four different variants of skull or one of four different variants of spine.

• 

  A fossil that generated inside a cave.

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  Excavating the fossil.

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  All skull and spine structures, excluding those made of coal ore.

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  Fossil generated on a superflat world. Some bone blocks are removed/replaced with coal ores.

Buildings

Buildings are naturally generating structures that form above ground. They can contain valuable treasure, but traps and puzzles as well.

Village

Villages are generated in desert, plains, taiga, and savanna biomes, and are a site for villagers, with whom the player can trade. They are composed of a random selection of various buildings and farms.

• 

  An old village generated on water.

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  A desert village in 12w21a.

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  A zombie village generated in an ice plains biome.

Desert temple

Desert temples are pyramid-shaped structures found in deserts, composed of mainly sandstone and stained terracotta. There is a hidden chamber in the middle of the temple, containing 4 treasure chests and a TNT trap.

• Desert Temple 14w03a.png

  The front side of the temple

• Desert Temple 14w03a Interior.png

  The inside of the temple

• 

  The treasure room.

Jungle temple

Jungle temples are found in jungles, and mainly consist of cobblestone and moss stone. There are three floors, the bottom floor containing treasure chests, tripwire-activated traps and a puzzle consisting of three levers that must be pulled in the correct combination to reveal one of the chests.

Witch hut

Witch huts are structures that generate in swamp biomes that have the ability to spawn witches. They are composed of several types of wood materials, and contain a crafting table, cauldron, and flower pot inside.

• 

  A closeup of a witch hut.

• Witch hut on top cave.jpeg

  A witch hut at the top of a cave.

• 

  A witch hut that generated in the middle of an ocean.

Woodland mansion

Woodland mansions are massive house structures that generate in roofed forests, containing a wide variety of rooms. They are the only place where evokers, vindicators, and vexes spawn naturally (but only once).

Ocean monument

Ocean monuments are underwater structures that generate in deep oceans. They are composed of all three variants of prismarine and sea lantern, and are the only places where guardians and elder guardians spawn naturally.

• 

  A view of the monument from above.

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  The treasure room of the monument.

• Protrusion Room.jpg

  An Elder Guardian roaming around the monument.

Igloo

Igloos are structures that generate in snowy biomes. The structure consists of the igloo house, as well as a basement.

• 

  An igloo from the outside.

• 

  An igloo from the inside.

• 

  A view of the secret basement.

Upcoming structures

These structures have not been implemented into a full version yet but have appeared in snapshots of upcoming versions.

Underwater ruins

Underwater ruins are clusters of many different blocks that generate underwater in ocean biomes, as well as on the surface on beaches. They come in many different variants - the cold variants consist primarily of stone bricks and the warm consist primarily of sandstone.

• 

  An underwater ruined village

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  Glazed terracotta that generated in a building of underwater ruins.

Buried treasure

Buried treasure structures consist of a single chest buried in the beach sand or gravel, with random loot in it.

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  A dug-up chest in a buried treasure structure that generated on land barely.

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  An open buried treasure chest, revealing lots of loot.

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  A buried treasure naturally generated in a Village.

Coral reef

Coral reefs are structures that generate in warm ocean biomes. They consist of multiple clusters of coral blocks, corals and coral fans. These clusters come in a wide variety of shapes, sizes, and colors, ranging from a few blocks of brain coral on the ground to large tree-like structures of fire coral.

• 

  A coral reef that generated in a ravine.

• Coral Reef 2.png

  A view of a coral reef close-up.

• 

  A coral reef as of snapshot 18w14b.

Shipwreck

Shipwrecks are structures that generate on the floor of oceans or beaches. They are made up of mostly wood materials, and contain 1-3 loot chests.

Iceberg

Icebergs are structures that generate in frozen oceans and their deep variants. They consists primarily of packed ice with a little bit of ice and blue ice, and will often be topped with snow. They are the only place where blue ice can be found naturally. Icebergs generate in a wide variety of shapes and sizes, ranging from small "islands" to giant mountain-like ice structures. They can also generate with "cave-like" holes in them, which sometimes reach to the other side of the iceberg.

• 

  First screenshot of an iceberg.

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  A naturally generated iceberg.

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  An aerial view of a frozen ocean with icebergs.

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  A snowy iceberg generated with blue ice.

• 

  An iceberg viewed from below.

The Nether

The Nether, though equally vast, contains far fewer types of generated structures than the Overworld.

Lava sea

Lava seas are found at and below level 30 in the Nether. They make a large portion of the Nether, and are extremely common. They can stretch for hundreds of meters in any direction, and are usually bordered by netherrack (or more rarely soul sand).

• 

  A lava sea with ghasts taking a dip in it

Nether fortress

Nether fortresses are very large complexes made mainly of nether bricks (with added nether brick fences and stairs to be found). They contain blaze spawners, nether wart farms, and loot chests in them.

• 

  A nether fortress generated in the Nether.

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  A nether wart room with nether wart growing on soul sand located within a nether fortress.

• 

  A blaze spawner located inside a nether fortress.

Glowstone clusters

Glowstone clusters are typically veins of glowstone that can be among the hardest natural materials to harvest that don't require digging. They form in coral-like structures on the underside of hanging Netherrack, so they are often found on the ceilings of the Nether, where they provide light along with the ever present lava.

• 

  A naturally occurring vein of glowstone.

Other things located in the Nether

There are areas of soul sand and gravel around layer 64, veins of nether quartz ore, large "veins" of magma blocks and "hidden lava", which is a single block of lava generated randomly between netherrack.

• 

  A patch of soul sand.

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  Hidden lava and nether quartz ore

• 

  Magma veins.

The End

The End is the final and most barren dimension, with very few types of significant structures, until after defeating the Ender Dragon, which will open gateways to more structures.

The Central Island

The center of the End is a large, asteroid-like island composed entirely of end stone, floating in the void. At a distance of 1000 blocks away, an endless expanse of more islands begins, away from the main island. These consist of large islands, about the size of the main island, and smaller ones, which are usually very thin and small.

• 

  The central island with a lone enderman.

Obsidian pillar

Obsidian pillars, also known as obsidian spikes or obsidian towers, are tall, tower-like structures that generate in The End. Y level of pillars are 76, 79, 82, 85, 88, 91, 94, 97, 100, and 103. Also, bottom of pillars' Y level is 0, means that pillars are generated through the island. End crystals will spawn on top of each one to heal the Ender Dragon.

10 pillars are generated in a circle around the fountain. End crystals of second and third shortest pillars are surrounded by iron bars, which must be destroyed before the crystal can be taken out.

• 

  Obsidian Pillars in The End before End Crystals were added. Endermen are also visible.

• TheEnd 1.9.png

  Several obsidian pillars surrounding the exit portal.

• 

  A square obsidian pillar. (Prior to 1.9)

Obsidian platform

The obsidian platform is a 5 by 5 square of obsidian that is generated once a player enters the End. (Note that if the obsidian is destroyed, or if a block is placed on top of it, when the player enters the End, the obsidian will be restored and any blocks on top of it will despawn.) Obsidian platforms generate at X, Y, Z = 100(100.5), 48, 0(0.5), mostly far away from the island, making it tough to get there. Players who enter the end will spawn at X, Y, Z = 100, 49, 0 and the other entities that enter the end will spawn at X, Y , Z = 100.5, 50, 0.5, the middle of platform and 1 block higher than the platform.

• Sometimes the platform generates inside a case of end stone. It will remove enough end stone so that the player can walk around.
• Occasionally the platform will generate in midair.

• 

  The obsidian platform, generated underground.

Exit portal

The exit portal is a structure that generates when the player goes to the End. It will activate after the player has killed the ender dragon, allowing them to go back to the Overworld.

End gateway portal

The end gateway portal is a portal to quickly get to the outer islands of the End. It can only be accessed via a one-block gap, meaning that ender pearls or an elytra is required to use it.

• PortalPurpleBeam.png

  A gateway portal emitting a magenta beam.

End city

End cities are tall castle-like structures that generate in the outer islands of the End, consisting primarily of end stone bricks, purpur blocks, and end rods. They are the only places where shulkers can be found.

• 

  The end city structure, including the end ship.

• 

  Inside the structure.

• 

  The treasure room of a city.

End ship

End ships have a fair chance of generating outside of end cities. They are the only place where elytra and a dragon head can be illegitimately obtained.

• 

  An end ship.

• 

  The end ship, viewed from the bow.

• 

  The treasure room of the ship.

Chorus tree

Chorus trees generate on the outer islands of the end. They are formed in tall, coral-like patterns.They consist of chorus stems and chorus flowers. A chorus flower will generate at the top of each branch. They are the only source of chorus fruit and chorus flowers. You can grow a new chorus tree by planting a flower on a block of endstone.

• 

  A chorus tree, next to a freshly planted flower. Enderman for scale.

• 

  Four chorus trees, each at different growth stages.

• 

  Half of a chorus tree generated inside of an end city room.

Return portal

Return portals generate randomly throughout the outer End islands. These will teleport the player back to the center island's spawn platform.

Technical details

Structures are generated for a given chunk after the terrain has been formed. The chunk format includes a tag called TerrainPopulated that indicates whether structures whose point of origin is in that chunk have been generated. If it is false or missing, they will be generated again. Structure generation is based on what is already in the chunk, so (for example) flagging a chunk that has already been populated for repopulation will approximately double the amount of ore in it.

When structures are generated, they can spill over into neighbouring chunks that have been previously generated. Thus, a tree at the edge of the generated world (and probably only visible using external tools) may be overwritten by a lake before you reach it. It is also theoretically possible for two worlds generated with the same seed, from the same version of Minecraft, to differ slightly depending on the players' travel routes, because the order in which chunks are generated may determine which of two conflicting structures will overwrite or suppress the other.

Videos

Structure/video

History

pre-classic
Cave game tech test					Development on "Cave Game" started; caverns added.
classic
0.0.12a					Added ocean around map.
0.0.14a					Added trees. At this point they were simply stumps covered with a thin leaf layer.
0.0.15a (Multiplayer Test 1)					Trees have a new shape.
0.24 (August 25, 2009)					Changed cavern generation; longer and narrower caverns, and bigger caves the deeper you travel.
					Surface lava lakes possible but unlikely, despite existing as early as 0.0.12a_03.
infdev
March 20, 2010					Re-added trees.
June 25, 2010, 2					Added dungeons.
alpha
v1.0.1					Caves can be far bigger and more expansive.
v1.2.0		Halloween Update			Added the Nether and all Nether-related generated structures, except for nether fortresses and magma veins.
v1.2.6					Added small lakes and rare lava pools, both on the surface and randomly in caves.
beta
1.8		1.8 Pre-release			Added abandoned mineshafts.
		release			Added villages.
					Added strongholds.
					Added huge mushrooms.
					Added river biomes and vast oceans.
					Sand and gravel beaches removed due to the changes in the terrain generation algorithm.
release
1.0.0		Beta 1.9 Prerelease			Added nether fortresses.
		Beta 1.9 Prerelease 4			Added the End and End-related generated structures, including the End island, the obsidian platform, the obsidian towers and the end fountain.
1.1		12w01a			Sand beaches have made a return, but the way they look and generate are not the same as before.
1.2.1		12w04a			Desert wells were added.
		12w07a			The generation of beaches has been greatly improved.
1.3.1		12w21a			Added desert temples.
		12w22a			Added jungle temples.
1.4.2		12w40a			Added witch huts.
1.6.1		13w17a			Water oases no longer generate in deserts.
1.7.2		13w36a			Gravel beaches have been returned to the terrain.
					Mountains now generate as part of the "M" biome variants.
					The desert oases appear in the desert M biome.
					Moss stone boulders were added.
1.8		14w25a			Added ocean monuments.
1.8.1		pre1			New witch huts can spawn witches Y 64 to 71. This allows for three spawning floors for witches.
1.9		15w31a			Added the outer islands of the End.
					Added the end city dungeon.
					Added chorus trees.
					Added the end gateway portal.
		15w43a			Added igloos with a 50% chance of having a basement.
1.10		16w20a			Added bone and coal ore fossils.
		16w21a			Blacksmiths now generate with cobblestone in all biomes, rather than acacia logs in savannas and sandstone in deserts.
		pre1			Zombie villagers generated in zombie villages no longer despawn.
					Wooden fences are now substituted with the correct wood type for the biome.
					Paths no longer replace most blocks, instead considering the blocks underneath, preventing them from generating in treetops or bridging ravines.
1.11		16w39a			Added woodland mansions.
					Added /locate command that shows the coordinates of the nearest structures.
upcoming
1.13		17w43a			Structures using structure files can now be modified, with the addition of data packs.
		17w47a			Flower pots in witch huts now have a mushroom inside of them; previously they were empty.
		18w08a			Caves and ravines can now generate underwater.
					Frozen Ocean have made a return, but without customized, they look and generate, but are not the same unused.
		18w09a			Added underwater ruin structures.
		18w10a			Added buried treasure structures.
		18w10d			Added coral reefs.
		18w11a			Added shipwrecks.
		18w15a			Added icebergs.
Pocket Edition Alpha
0.1.0					Added beaches, ocean, frozen ocean, cliffs, mountains, basin, mineral vein, trees.
0.7.0					Added gravel beaches.
0.9.0		build 1			Added villages, caves, lava pools, rivers, abandoned mineshafts, huge mushrooms, moss stone boulders, strongholds, ice patches, ice spikes, dungeons and desert wells.
					Frozen Ocean is no longer generated.
					Removed gravel beaches.
0.10.0		build 1			Abandoned mineshafts generate above ground in mesa biomes.
0.11.0		build 1			Added desert wells.
0.12.1		build 1			Added the Nether along with lava oceans, glowstone clusters, Nether Fortresses, soul sand beaches, hidden lava, gravel beaches, and Nether quartz veins.
0.13.0		build 1			Added desert temples.
0.14.0		build 1			Added witch huts.
					Cauldron generates with random potion.
0.15.0		build 1			Added jungle temples.
					Added savanna and taiga village variants.
					Villages can generate in cold taiga and ice plains biomes. Buildings are made out of spruce wood like taiga villages.
					Villages have a 2% chance to generate as zombie villages. Buildings in zombie villages contain cobweb and moss stone.
0.16.0		build 1			Added ocean monuments.
Pocket Edition
1.0		build 1			Added the End and End-related generated structures, including the End islands, the obsidian platform, the obsidian towers, the end fountain, end cities, end gateways and chorus trees.
					Added igloos.
1.1		build 1			Added woodland mansions.
1.1.3		build 1			Added fossils.
Bedrock Edition
1.2		build 1			Added ravines.
1.2.14		build 1			Added buried treasure structures.
					Added shipwrecks.
					Added icebergs.
					Added coral reefs.
					Ravines can now generate underwater.
		build 1			Frozen ocean have made a return, but the way they look and generate are not the same as before.
Upcoming Bedrock Edition
1.2.20		build 1			Added underwater ruins.
					Caves can now generate underwater.
Legacy Console Edition
TU5	CU1	1.0	Patch 1	Patch 1	Added villages, abandoned mineshafts, strongholds and ravines.
					Sand and gravel beaches removed due to the changes in the terrain generation algorithm.
TU9					Added the End along with End-related structures such as the End island, the obsidian platform, the obsidian towers and the end fountain.
					Sand beaches have made a return, but the way they look and generate are not the same as before.
TU12					Desert wells were added.
TU14		1.04			Added jungle and desert temples.
TU19	CU7	1.12			Added witch huts.
					Water oases no longer generate in deserts.
TU31	CU19	1.22	Patch 3		Added ocean monuments.
TU43	CU33	1.36	Patch 13		Added fossils and igloos.
TU54	CU44	1.52	Patch 24	Patch 4	Added woodland mansions.

Trivia

• In previous versions, before snow cover was solid, a lava lake with floating snow cover above it could be a deadly trap before the snow melted.
• The smallest possible fully-grown chorus tree (assuming the growth is not obstructed) would have 5 chorus plants.
• Internally, witch huts, jungle temples, desert temples, and igloos are all the same structure, but they appear different depending on the biome. This means that they cannot be distinguished when using /locate.‌^[upcoming]

See also

• Biome
• History of biomes and generated structures
• Generated structures data file format