A dungeon entrance can be built as a centrepiece for a Garden or Formal Garden in a player-owned house. It is, as the name suggests, used as an entrance to a player's dungeon. It can only be used to access the dungeon if the player has a stairway conjunction built below the garden. It can be accessed during challenge mode, which can be triggered by activating a lever in a throne room.
When choosing the orientation of the garden before building it, the default direction of the garden makes the entrance face away from the player, and must be rotated twice in order for the entrance to face the player when built. However, players may enter the dungeon entrance from any direction.