This is a survival Minecraft world made with a few mods that enhance structures in vanilla Minecraft witch also includes Terralith.
This world is fully Vanilla But Terralith is highly recommended or else biomes may not be the same.

This a highly detailed world that has new custom structures dungeons and upgraded vanilla builds littered around

Terralith Is Highly Recommended

www.planetminecraft.com/data-pack/terralith-overworld-evolved-100-biomes-caves-and-more/