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Map view highlighting the Cavern layer range
The change of background that marks the beginning of the Cavern layer.

The Cavern layer is the largest layer of the world, beginning just below the Underground and extending down until the Underworld layer. Darker stone background tiles characterize it. Stone is the predominant block in this layer (as opposed to Dirt in the Underground). Caverns contain occasional Underground Cabins where valuables can be found, as well as Glowing Mushroom biomes, mini-biomes like the Spider Nest, and occasional traps. In the lower areas of the Cavern layer, pools of lava can be found.

Furthermore, the Cavern layer contains the underground versions of several surface biomes: the Ice biome, Underground Jungle, Underground Desert(Desktop, Console and Mobile versions), and Underground Corruption/Crimson and Hallow. A large section of the Dungeon also extends through the Cavern layer.

After defeating at least one Goblin Invasion, the Goblin Tinkerer NPC can be found in this layer. The Wizard NPC can also be found in this layer at any time during Hardmode.


Unique Treasures
Unique Drops
  • CompassCompass(Desktop, Console, Old-gen console and Mobile versions)(uncommon)
  • RallyRally(Desktop, Console and Mobile versions)(rare)
  • Potato ChipsPotato Chips(Desktop, Console and Mobile versions)(rare)
  • Bat BatBat Bat(Desktop, Console and Mobile versions)(uncommon)
From Cave Bats:
From Tims:
From Nymphs:
  • Red HuskRed Husk(Desktop, Console, Old-gen console and Mobile versions)
From Pinky:
  • Pink GelPink Gel(Desktop, Console and Mobile versions)
From Skeletons:
From terrain:
  1. Spawns from Mother Slimes

NPC happiness (Desktop, Console and Mobile versions)

UndergroundUnderground / CavernCavern / The UnderworldThe Underworld
Loved byn/a
Disliked by
Hated byn/a

For more information, see NPC happiness.


  • A pure Cavern biome is required for fishing in Cavern, otherwise no Cavern-exclusive fishing catches can be obtained.



This content is transcluded from Biome backgrounds § Cavern.