Alter Aeon Online Help

Keywords are:  'enter portals'

Certain places on the mud, you will find portals that take you to other
places.  To use a portal, use the 'enter' command.
Example:

prompt> look
Generic cliff face
A generic cliff face stands before you, described in a big long description.
A crack has opened in the cliff face here, leading into darkness.
[Exits: none]

prompt> enter crack
You enter a large crack in the cliff face, and emerge on the other side.