Cavern

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BiomeBannerCavern.png
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
Cavern
Characters Unique Drops
Black Slime.png Black Slime 
Mother Slime.png Mother Slime 
Baby Slime.png Baby Slime 
[1]
Giant Worm.png Giant Worm 
Skeleton.png Skeleton 
Cave Bat.png Cave Bat 
Salamander.png Salamander Desktop only.png
Desktop only.png
Crawdad.png Crawdad Desktop only.png
Desktop only.png
Giant Shelly.png Giant Shelly Desktop only.png
Desktop only.png
Undead Miner.png Undead Miner 
(uncommon)
Vampire Miner.png Vampire Miner Console only.pngMobile only.png
Console only.png Mobile only.png
Tim.png Tim 
(rare)
Nymph.png Nymph 
(rare)
Pinky.png Pinky 
(rare)
Cochineal Beetle.png Cochineal Beetle 
(uncommon)
Mouse.png Mouse

In Water:

Blue Jellyfish.png Blue Jellyfish 
Piranha.png Piranha 

In Spider Nests:

Wall Creeper.png Wall Creeper 

In Hardmode:

Digger Head.png Digger
Giant Bat.png Giant Bat 
Armored Skeleton.png Armored Skeleton 
Skeleton Archer.png Skeleton Archer 
Rune Wizard.png Rune Wizard 
(rare)
Ghost (enemy).png Ghost (enemy) 
during Halloween

In Water in Hardmode:

Angler Fish.png Angler Fish 
Green Jellyfish.png Green Jellyfish 

In Spider Nests
in Hardmode:

Black Recluse.png Black Recluse 

Traps:

Dart Trap.png Dart Trap 
Boulder.png Boulder 
Explosives.png Explosives 
(rare)

From Giant Worms
and Diggers:

Whoopie Cushion.png Whoopie Cushion 
(rare)

From Cave Bat:

Chain Knife.png Chain Knife 
(uncommon)
Depth Meter.png Depth Meter 
(uncommon)

From Vampire Miner
and Undead Miner:

Mining Shirt.png Mining Shirt 
(uncommon)
Mining Pants.png Mining Pants 
(uncommon)

From Undead Miner:

Bone Pickaxe.png Bone Pickaxe 
(rare)

From Vampire Miner:

Vial of Blood.png Vial of Blood Console only.pngMobile only.png3DS logo.svg
Console only.png Mobile only.png

From Tim:

Wizard Hat.png Wizard Hat 
(always)

From Nymph:

Metal Detector.png Metal Detector Desktop only.png
50% / 100% Desktop only.png chance

From Cochineal Beetle:

Red Husk.png Red Husk 

From Skeleton:

Ancient Iron Helmet.png Ancient Iron Helmet 
(rare)
Ancient Gold Helmet.png Ancient Gold Helmet 
(rare)
Bone Sword.png Bone Sword 
(rare)
Skull.png Skull 
(very rare)

From Armored Skeleton:

Beam Sword.png Beam Sword 
(rare)

From Skeleton Archer:

Magic Quiver.png Magic Quiver 
(uncommon)
Marrow.png Marrow 
(uncommon)

From Rune Wizard:

Rune Hat.png Rune Hat 
(always)
Rune Robe.png Rune Robe 
(always)

From terrain:

Enchanted Sword (item).png Enchanted Sword 
(extremely rare)
Arkhalis.png Arkhalis Desktop only.png
Desktop only.png (extremely rare)

From Fishing:

Scaly Truffle.png Scaly Truffle 
(specific conditions)
  1. Spawns from Mother Slimes

History[edit | edit source]

Biomes
 
Surface Layers Forest • Desert • Ocean • Snow • Jungle • Mushroom • The Corruption • The Crimson • The Hallow • Space
Underground Layers Underground • Cavern • Underground Snow • Desktop only.png Underground Desert • Underground Jungle • Underground Mushroom • Underground Corruption • Underground Crimson • Underground Hallow • The Underworld
Special Biomes Meteorite • Desktop only.png Granite Cave • Desktop only.png Marble Cave • Spider Nest • Bee Hive • Dungeon • Lihzahrd Temple
Other Living Tree • Desktop only.png Enchanted Sword Shrine • Floating Island • Underground Cabin • Chasm • Pyramid • Jungle Shrine • Desktop only.png Living Mahogany Tree • Mobile only.png Jungle Sanctum • Ruined House