The Caves of the Twilight Forest twist through the roots and soil beneath the trees. More of the rock is covered in dirt blocks, making it slightly more difficult to find ore than in Overworld Caves. Unlike the Overworld, the lower layers of the Caves are not filled with lava, but with water, although lava lakes still generates underground.
|Biomes and Landmarks|
|Biomes||Dark Forest • Dark Forest Center • Deep Mushroom Forest • Dense Twilight Forest • Enchanted Forest • Final Plateau • Fire Swamp • Firefly Forest • Glacier • Mushroom Forest • Oak Savannah • Snowy Forest • Thornlands • Twilight Clearing • Twilight Forest • Twilight Highlands • Twilight Lake • Twilight Stream • Twilight Swamp|
|Progression Landmarks||Naga Courtyard • Lich Tower • Labyrinth • Hydra Lair • Goblin Knight Stronghold • Dark Tower • Yeti Lair • Aurora Palace • Troll Caves • Cloud Cottage • Final Castle|
|Other Landmarks||Minor Landmarks • Caves • Hedge Maze • Hollow Hill • Magic Trees • Mushroom Castle • Quest Grove • Twilight Forest Trees|