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The change of background that marks the beginning of the Cavern layer.

The Cavern layer is the largest layer, beginning just below the Underground and extending all the way down until the Underworld layer. It is characterized by darker stone background tiles. 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 Mushroom Biomes, dangerous traps, rare and dangerous Spider Nest mini-biomes, and much more.

Lava begins to appear around -2100ft in small pools, which gradually become lava wells at around the -3000ft mark.

Map Size Min Start Depth Average Start Depth Max Start Depth
Small 120 ft 480 ft 840 ft
Medium 180 ft 720 ft 1260 ft
Large 240 ft 960 ft 1680 ft

Contents[edit | edit source]

Map view highlighting the Cavern layer range
Characters Unique Drops
Black SlimeBlack Slime
Mother SlimeMother Slime
Baby SlimeBaby Slime[1]
Giant WormGiant Worm
Cave BatCave Bat
SalamanderSalamanderDesktop VersionConsole Version
CrawdadCrawdadDesktop VersionConsole Version
Giant ShellyGiant ShellyDesktop VersionConsole Version
Undead MinerUndead Miner(uncommon)
Vampire MinerVampire MinerOld-gen console versionMobile Version3DS version
Cochineal BeetleCochineal Beetle(uncommon)

In Water:

Blue JellyfishBlue Jellyfish

In Spider Nests:

Wall CreeperWall Creeper

In Hardmode:

Giant BatGiant Bat
Armored SkeletonArmored Skeleton
Skeleton ArcherSkeleton Archer
Rune WizardRune Wizard(rare)
Ghost (enemy)Ghost (enemy)(during Halloween)

In Water in Hardmode:

Angler FishAngler Fish
Green JellyfishGreen Jellyfish

In Spider Nests
in Hardmode:

Black RecluseBlack Recluse


Dart TrapDart Trap

From Giant Worms
and Diggers:

Whoopie CushionWhoopie Cushion(rare)

From Cave Bat:

Chain KnifeChain Knife(uncommon)
Depth MeterDepth Meter(uncommon)

From Vampire Miner
and Undead Miner:

Mining ShirtMining Shirt(uncommon)
Mining PantsMining Pants(uncommon)

From Undead Miner:

Bone PickaxeBone Pickaxe(rare)

From Vampire Miner:

Vial of BloodVial of BloodOld-gen console versionMobile Version3DS version

From Tim:

Wizard HatWizard Hat(always)

From Nymph:

Metal DetectorMetal DetectorDesktop VersionConsole Version(50% / 100% chance)

From Cochineal Beetle:

Red HuskRed HuskDesktop VersionConsole VersionOld-gen console versionMobile Version

From Skeleton:

Ancient Iron HelmetAncient Iron Helmet(rare)
Ancient Gold HelmetAncient Gold Helmet(rare)
Bone SwordBone Sword(rare)
SkullSkull(very rare)

From Armored Skeleton:

Beam SwordBeam Sword(rare)

From Skeleton Archer:

Magic QuiverMagic Quiver(uncommon)

From Rune Wizard:

Rune HatRune Hat(always)
Rune RobeRune Robe(always)

From terrain:

Enchanted SwordEnchanted Sword(extremely rare)
ArkhalisArkhalisDesktop VersionConsole Version(incredibly rare)

From Fishing:

Scaly TruffleScaly TruffleDesktop VersionConsole VersionOld-gen console versionMobile Version(specific conditions)
  1. Spawns from Mother Slimes

History[edit | edit source]