Stairway to Heaven

The Stairway to Heaven glitch can be performed on many levels in Halo 3s Campaign. It is a really amusing glitch, and can lead to the discovery of other glitches and easter eggs.

Sierra 117
To get to the Stairway to Heaven on Sierra 117, a glitch must be used to get out of the map, and then you just need to walk to the edges of the map, and walk over them, and you will be climbing an angled invisible floor.