Explore the Underground
Substratum transforms Minecraft’s world generation into a completely underground experience, featuring 14 unique cave biomes with distinct themes, features, and terrain generation. From the glowing Honey Grotto to the icy Frozen Caverns, each biome offers a unique exploration experience.Quick Start
Get Substratum installed and running on your server
Cave Biomes
Explore all 14 unique underground biomes
Configuration
Customize biome distribution and world generation
Drop-In Merge
Add Substratum caves to existing Terra packs
Key Features
14 Unique Biomes
Each cave biome features custom terrain palettes, unique decorations, and specialized features
Advanced Cave Carving
3D noise-based generation with spaghetti caves, cheese caves, and mega cave systems
Fully Customizable
Configure biome scales, Y-level ranges, strata layers, and enable/disable individual biomes
Installation Options
Choose the installation method that works best for your setup:World Installation
Create a fully underground Substratum world from scratch
Drop-In Merge
Add Substratum’s cave biomes to an existing Terra pack
Popular Biomes
Honey Grotto
A sweet underground paradise filled with giant bee nests and flowering vegetation
Frozen Caverns
Icy caves adorned with massive ceiling and ground icicles
Molten Passages
Dangerous lava-filled caves with magma streams and charred terrain
Amethyst Hollow
Crystalline caves featuring amethyst geodes and clusters