This mod adds a highly configurable dimension that only consists of caves.
Creating the teleporter only requires very basic resources to make it accessible very early in game.
The teleporter is your door to the mining dimension.
Just place it down and right-click it.
Configuration (1.16.2 and higher)
Due to the changes in Minecraft 1.16, you have to create a datapack to modify the dimension itself. Example data packs can be found here.
Overworld dimension The dimension from where you can teleport to the mining dimension and back
Show custom world warning If the game should show the custom world warning when loading a world
Configuration (1.15.2 and lower)
Cave percentage The Amount of caves generated
Canyon percentage The Amount of canyons generated
Lava lakes If lava lakes should be generated
Spawners If dungeons with spawners should be generated
Stone variants If the different stone variants should be generated
Ores If ores should be generated
Lava If lava should be generated in caves below level 11