This Environment lies just below the Underground Layer and can be characterized by the darker stone backdrop walls and replacement of Dirt by Stone. Plenty of minerals and Gem deposits is also another feature of this Environment. In hard mode, Hallow and Corruption may engulf this Environment. If this happens, then both the Cavern and themed enemies need to be contended with.
The unique items drop for this Environment are:
- Hook - Dropped from Undead Miners, Skeletons and Piranhas.
- Whoopie Cushion - Dropped from Diggers and Giant Worms.
- Wizard Hat - Dropped from Tim.
- Mining Shirt and Mining Pant - Dropped from Undead Miner.
- Glowing Mushroom - Dropped from terrain.
- Mushroom Grass Seeds- Dropped from terrain.
