It's false to believe, All thanks to a unique generation error, due to which underground chunks are duplicated along the Z axis an infinite number of times. Thanks to this, cave sections are constantly copied, and the main interest for players is the endless mines that can be found throughout the world. Some of them are very close to the spawn point.

Depending on the version, the shafts are at different depths. In new versions they are located very close to the surface, so they are interrupted at sea. In 1.12.2 they are deeper, so they are found even under the ocean. The nearest endless mine in version 1.12.2 is located at coordinates -620 ~ 200. In this place you will find an island where you can safely dig deeper.

On version 1.13 and higher, the mines stretch along the entire zero coordinate along the Z axis. But since the game starts on an island, you will need to start getting to the continent. The nearest shore where you can find an endless mine is located at coordinates 1000 ~ 0. And at point 1500 ~ 0 the mine passes through an underground fortress.

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