Iron bars

Dungeon features
Air	_ Altar
# Corridor	# Cloud
#. Drawbridge	+-| Door
. Doorway	{ Fountain
| Headstone	.  Floor
>< Ladder	. Ice
# Iron bars	} Lava
} Moat	# Sink
Solid rock	>< Staircase
\ Throne	^" Trap
# Tree	- | Wall
~ Vibrating square

Iron bars are a dungeon feature represented by #.

They are never randomly generated. There are iron bars in the Wizard and Ranger quests.

You cannot walk through them, and objects thrown through them have a chance of being stopped by the iron bars. Many creatures can pass through them, including xorns, snakes, and yellow and black lights.