Terraria Wiki

  • Discussions are now available on the Terraria Wiki.
  • Miss the old Hydra Skin? Try out our Hydralize gadget! Visit the preferences page while logged in and turn on the gadget.


Terraria Wiki

Spider Nests, also known as Spider Caves or Spider Caverns, are mini-biomes located in the Cavern layer. They feature distinct black Background walls and there are numerous Cobwebs filling the area. The Cobwebs rapidly grow back, which is a unique feature of the biome. Spider Nests can rarely contain Web Covered Chests, which they may generate with during world creation. The webbed Stylist NPC can spawn here.


Unique Treasures
Unique Drops



Cobwebs in a Spider Nest as seen while using a Dangersense Potion.

  • The size of a Spider Nest is always between 500 tiles and 3499 tiles, inclusive. Most of the time they are in the Cavern layer and not in a Glowing Mushroom biome, but there are rare exceptions.
  • The Spider Nest seems to have an increased enemy spawn rate. Standing still and not killing any enemies may allow as many as 25 enemies to spawn, even with no spawn rate buffs.Verify
  • The spider- and Cobweb-spawning properties of the biome are a result of the special wall tile present. Removing all the wall tiles with a hammer will effectively remove the biome.
    • Another unique property of the background wall type is the reduced chance of dropping Cobwebs. Instead of every Cobweb destroyed dropping one Cobweb item, only 25*1/4 (25%) of Cobwebs in front of this background wall will drop a Cobweb item.
  • The biome can be restored, or created elsewhere by placing Infested Spider Walls, which are created when Spider Walls are thrown into Shimmer. Once placed, the walls become unsafe Spider Walls.


Achievement Jeepers Creepers
Jeepers Creepers • Stumble into a spider cavern in the underground.
Enter your first underground Spider Cave.
Category: Explorer Explorer


Spider Cave under Dangersense Potion

Cobwebs in a Spider Nest as seen using a Dangersense Potion in 1.4.

  • The Dangersense Potion can be useful in locating Spider Nests, because the Cobwebs inside sparkle in a unique pattern.
  • Creating three-block-high diagonal tunnels into a Spider Nest using a hammer to slope the floor and ceiling will prohibit spiders from exiting (or entering, if they spawn outside), but not the player. This can be a good tactic to trap and easily kill spiders. Similarly, spiders can not fit into two-block-wide vertical tunnels.
  • If a player finds themselves crossing through a Spider Nest while creating a hellevator, to prevent cobwebs from generating and slowing them down during freefall, ropes or torches can be placed on the spider background walls, thus occupying the space where cobwebs would have grown. Alternatively, if the player does not want to use up torches, they may use a hammer to remove the walls instead.
  • Mining out the area, aside from the walls, may allow for a money farm to be made.
  • The quickly regrowing cobwebs can be broken and turned into Web Rope, selling for 2 each.