The World Beneath
by popeg
The World Beneath adds five cave biomes beneath the surface of vanilla worlds, each with its own mushrooms, ores and hazards for players to explore.
What it does
The mod enlarges underground exploration by generating new cave regions that sit below the existing terrain. Each cave biome has a distinct theme: a luminous cave where glowing mushrooms light the surroundings, an oxidized area of charred rock and lava, a hot molten quarry, a humid jungle filled with toxic mushrooms and poisonous vegetation, and a mushroom field upgrade that adds new glowing mushrooms. The glowing caverns generate only beneath Mushroom Islands, forming a bioluminescent biome.
The mod is available for Forge and NeoForge, with files for 1.20.1 and 1.21.1. Both loaders run the same content, and the environment is client and server, so the server and every player need it. Files are in the beta channel, and the author notes that the project is undergoing a major rework, with two more caves planned.
Key features
Glowing Caverns
Luminous caves full of glowing mushrooms that light up their own surroundings, found only beneath Mushroom Islands.
Rusted Depths
An oxidized cave of charred rock and lava that yields ferrosite, a mineral used for decoration and thermal systems.
Molten Quarry
A lava-filled cave that mainly generates in hot desert regions and also holds ferrosite.
Overgrowth Grotto
Overgrowth Grotto is a cave biome with dense jungle growth, giant toxic mushrooms and poisonous plants that thrive in damp underground air.
Fiber and maqui berries
Two new crops join the mod, and fiber is useful for decoration and for crafting a grappling hook.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Exploring deeper caves
Players who explore underground in survival worlds can reach new cave biomes, each with its own resources.
Who it’s for: Players who want more variety in underground exploration and server owners who add new biomes to vanilla worlds. Both client and server need the mod.
How it compares
Giant Brown Mushroom and Giant Red Mushroom are both all rights reserved and client and server, with files covering 1.20.1 – 1.21.11, so they overlap with the Mushroom Islands theme of The World Beneath. World of Lush Caves is server required and client optional, released under the GNU General Public License v3.0 only, and supports 1.19 – 1.21.4 across Fabric, Forge, NeoForge and Quilt.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| The World Beneath | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2026-06-06 |
| Giant Brown Mushroom | Fabric, Forge and NeoForge | 1.20.1 – 1.21.11 | Client and server | 2026-02-08 |
| Giant Red Mushroom | Fabric, Forge and NeoForge | 1.20.1 – 1.21.11 | Client and server | 2026-02-09 |
| World of Lush Caves | Fabric, Forge, NeoForge and Quilt | 1.19 – 1.21.4 | Server required, client optional | 2025-02-13 |
Questions
Which loaders does The World Beneath support?
Does the server need The World Beneath?
Is the mod still being updated?
In the catalog
The World Beneath is one of 19,031 Adventure mods on ModsFinder, and one of 10,478 Adventure mods for Forge. 32,366 mods support Minecraft 1.21.1.
Similar mods
What the author says
The World Beneath is a vanilla-friendly mod that aims to expand the caves of minecraft adding five new cave biomes in the underground, each cave has a purpose to be explored and discovered. ‼️‼️The World Beneath is currently undergoing a major rework. ‼️‼️
Official listing
- Modrinth page
- modrinth.com/mod/the-world-beneath
- Owner
- popeg
- Published
- 2026-06-06
- Updated on Modrinth
- 2026-06-06
- Facts verified
- 2026-10-15