# Branch
In NetHack, branches are paths you can take within the Mazes of Menace that will lead you to various useful (and often optional) rewards. They are not to be confused with special levels, though most branches contain them &nbsp; the Big Room is a special level, but it is not a branch in the dungeon.  The monster frequency of randomly-generated monsters in dungeon branches may be biased toward specific alignments.
Below is a list of dungeon branches:

The Dungeons of Doom, which contains the following dead-end branches:
The Gnomish Mines, which is eight or nine levels deep and biased toward lawful alignment.
Sokoban, which is always four levels high and biased toward neutral alignment.
The Quest, which is 5-7 levels deep and contains your role's quest artifact as well as the Bell of Opening.
Fort Ludios, which may be accessible through a magic portal found in a vault.
Gehennom, which contains the following dead-end branch:
Vlad's Tower, which is always 3 levels high, contains the Candelabrum of Invocation, and is biased toward chaotic alignment.
The Endgame, consisting of the four Elemental Planes and the Astral Plane.
The Wizard's Tower is not considered a dungeon branch, though it behaves similar to one for purposes of level teleportation.

Variants
UnNetHack
UnNetHack makes some changes to existing branches and adds several new ones to the dungeon - see UnNetHack § Branch changes for full details.

See also
The Eye of the Aethiopica, which can be invoked to teleport between dungeon branches.

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