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Subterranean Expansion Cave Update Mod overhauls the underground caves in your world. It adds new natural details and unique cave biomes to make mining below ground much more interesting. You will find different shapes of stone hanging from the ceilings and growing from the floors as you travel. The mod also changes how some caves look based on the biome above them, giving each area a special feel.

Subterranean Expansion Cave Update Mod

Features:

  • New Stone Shapes: Adds stalagmites and stalactites for almost every stone type, including granite, deepslate, and tuff.
  • Frosted Caves: Generates cold underground areas filled with frost blocks and icy details.
  • Generates massive underground glaciers that stretch across many chunks.
  • Changes desert caves to use sandstone near the surface and deep sandstone further down.
  • Spreads patches of cobblestone naturally throughout normal caves.
  • Works with your favorite resource packs, so the new stone shapes match your custom textures.
  • Includes a config file so you can adjust how the underground rules work.

Screenshots:

Various stone stalagmites arranged on the grass in a cherry blossom biome
Various stone stalagmites arranged on the grass in a cherry blossom biome
Showcase of different stone stalagmites from the Subterranean Expansion Cave Update Mod
Showcase of different stone stalagmites from the Subterranean Expansion Cave Update Mod
Dark underground cave with wooden ceiling planks and natural cobblestone wall patches
Dark underground cave with wooden ceiling planks and natural cobblestone wall patches
Large desert cave with sandstone pillars and stalactites hanging from the ceiling
Large desert cave with sandstone pillars and stalactites hanging from the ceiling
A dark cavern with stalactites and stalagmites from Subterranean Expansion Cave Update Mod
A dark cavern with stalactites and stalagmites from Subterranean Expansion Cave Update Mod
Vertical cave walls displaying natural layers of granite and diorite stone blocks
Vertical cave walls displaying natural layers of granite and diorite stone blocks
Frozen underground cave filled with hanging icicles and blocks of blue ice
Frozen underground cave filled with hanging icicles and blocks of blue ice
Massive subterranean glacier featuring large ice pillars and frozen cave walls
Massive subterranean glacier featuring large ice pillars and frozen cave walls

Subterranean Expansion Cave Update Mod Download Links

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For Minecraft 1.21.1, 1.21

NeoForge 3 MB Aug 13, 2026

For Minecraft 1.20.1, 1.20

Forge 3 MB Aug 13, 2026

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