Many magical and non-magical means of travel and navigation require complete memory of a location. Failure to store a destination in memory can prove disastrous. The higher trained one is in the art of location memory, the more locations he can remember safely.
Usage:
use location memory at remember <location>
You can get a list of the locations you remember by typing:
use location memory at list
To forget a location:
use location memory at forget <location>
use location memory at forget <location1>, <location2>, ...
To rename a location:
use location memory at rename <location1> to <location2>