YUNG's Cave BiomesMods · 1.18 – 26.xAdds new vanilla+ cave biomes and underground content!

Adds underground biomes and underground dungeons, as well as some above ground structures, in a modular and configurable way.
Direct download from Modrinth · 3,086,188 downloads
Underground Worlds is a mod made by HexagonNico. Adds underground biomes and underground dungeons, as well as some above ground structures, in a modular and configurable way.
It supports Minecraft 1.19 – 26.x. It has been downloaded 3,086,188 times on Modrinth. The last update came out on Sep 2, 2026.
Underground Worlds has had 157 releases on Modrinth since Oct 1, 2023. 88 of them came out in the past year. The newest is 3.2.1-26.1, released on Sep 2, 2026. It is made for Minecraft 26.2. It runs on NeoForge. The download is 3.9 MB.
| Version | Released | Minecraft | Type |
|---|---|---|---|
3.2.1-26.1 | Sep 2, 2026 | 26.2 | Release |
3.2.1-26.2 | Sep 2, 2026 | 26.2 | Release |
3.2.1-26.2 | Sep 2, 2026 | 26.2 | Release |
3.2.1-26.1 | Sep 2, 2026 | 26.1, 26.1.1, 26.1.2 | Release |
3.2.1-26.1 | Sep 2, 2026 | 26.1, 26.1.1, 26.1.2 | Release |
Underground Worlds is a Minecraft mod that adds underground biomes and underground dungeons, as well as some above ground structures, in a modular and configurable way.
Underground Worlds was born as Underground Jungle, a mod that added an underground jungle biome and a jungle temple somewhat inspired by the one in Terraria.
When the development continued and more biomes were added, I decided it would have been better to put all biomes in the same mod and allow users to enable and disable features through config files instead of making a separate mod for each biome.
All biomes added by Underground Worlds can be enabled or disabled in the config.
The config can also disable certain features for each biome.
Underground Worlds adds new underground biomes and structures, each with their own set of features.
Biomes and structures can have their exclusive mobs, set of tools, and other special items.
A full list of features can be found in the Wiki.
When using Underground Worlds alongside other world generation mods, it may be necessary to use TerraBlender or Lithostitched for the biomes to generate in the world.
Modrinth: modrinth.com/mod/underground-worlds
Curseforge: curseforge.com/minecraft/mc-mods/underground-wo…
If you find this mod on other distribution platforms, these are NOT managed by me.
Mod Author: HexagonNico
Chiseled Temple Bricks texture by Matriax (CC-0)
Jungle bee model by FrostYieBoiy (CC-BY 4.0)
Wrapped model by Nightfoxy3D (CC-BY 4.0)
"Abbeyence" music by Spring (CC-BY 3.0)
Q: Can I use this in my modpack?
A: Yes. You don't need to ask for permission. See [License](#license) for details.
Q: Can you port this mod to 1.\d\d.\d?
A: I can, but remember that I'm a human being and porting the mod to another version requires additional effort to maintain each version. Please refrain from opening issues like "Port to 1.3.2 when".
Q: Can you translate this mod to ww_ww?
A: You can submit a pull request if you want to contribute!
This mod is licensed under Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International.
You are free to share, copy and redistribute this mod in any medium or format, including modpacks, adventure maps, and
other creations made within Minecraft, as long as you respect the following conditions.
You are free to use this mod in any modpack, as long as you do not sell it via any means.
You cannot re-upload this mod on other mod distribution platforms.
Written by HexagonNico. Read it with pictures on Modrinth.
This mod is needed on both the server and every player who joins.
Install Fabric, Forge and NeoForge for Minecraft 1.19 – 26.x.
Download the .jar file from Modrinth and put it in the mods folder of your .minecraft directory.
Start Minecraft with the Fabric profile.
Easier: in Prism Launcher or the Modrinth App, search for Underground Worlds in your instance's mods and click Install. It adds the loader and the mods it needs for you.
Full guide: How to install Minecraft mods
| Resource | Downloads | Versions | Last update | Price |
|---|---|---|---|---|
| 3.1M | 1.19 – 26.x | Sep 2, 2026 | Free | |
| 4.6M | 1.18 – 26.x | Aug 19, 2026 | Free | |
| 3.5M | 1.20 | May 8, 2025 | Free | |
| 3.4M | 1.16 – 1.21 | Sep 21, 2026 | Free |
Yes. Underground Worlds supports Minecraft 26.x. All supported versions: 26.x, 1.21, 1.20, 1.19.
Yes. Underground Worlds is free to download from Modrinth.
Both. The server and every player need Underground Worlds installed.
Yes: TerraBlender, Variants&Ventures, Lithostitched, Biolith, Friends&Foes (Forge/NeoForge). Install it before Underground Worlds.
Yes. The last update came out in the past day.
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