For Minecraft 1.12+ CurseForge : https://minecraft.curseforge.com/projects/underground-biomes
JonathanCSmith/UndergroundBiomesConstructs
Underground Biomes Constructs for Minecraft 1.12.2 / 1.13.2
JavaNOASSERTION
Underground Biomes Constructs for Minecraft 1.12.2 / 1.13.2
JavaNOASSERTION
For Minecraft 1.12+ CurseForge : https://minecraft.curseforge.com/projects/underground-biomes