For Labyrinths in Twilight Forest, see Labyrinth (Twilight Forest). 

The Labyrinth is a one-level generated structure added by Project Zulu that is found in the Overworld and houses both treasure and monsters. It will only ever have a staircase opening on the surface where it will go down into a maze where Mimics, Minotaurs, Haunted Armor, and Vanilla Minecraft mobs lurk.

Spider Webs that can make navigation a challenge litter the Labyrinth.

There are areas where the wall is entirely cracked stone bricks. In this instance, the wall will likely be hiding a concealed room possibly containing treasure and Monster Spawners.