There are very large spaces between dungeons, cities, islands, and other
places and these are classified as parts of the "outerworld." This terrain
is often dangerous because other beings inhabit it.  To see the terrain
around you on the planet you're on, type map (HELP MAP). If you can't see a
map, you're probably not in the outerworld.

NOTE: Being outsides does not equate to being on the outerworld! 
Outerworld is a loose term for the very large external terrain that all
areas are placed on.  Castles can only be built in the Outerworld (HELP
CASTLES).

Overland movement is taxing.  Each square on the map is approximately 40
square miles.  Therefore, moving over terrain will cause you to run out of
endurance points.  However, there are several factors that affect overland
movement:

SIZE: Being very large makes moving through some terrains easier.  Being
very small makes it harder.
FLYING: Flying costs 1 EP regardless of what terrain you're flying over. 
It costs EP to fly with wings, it doesn't cost any EP to fly magically.  
TERRAIN: Some terrains cost more EP than others.  Mountains cost the most,
roads cost nothing.
NATURAL TERRAIN: The terrain that your race is most comfortable with. 
Races that are used to living in the mountains are not as impaired by them.
HOME WORLD: The world from which your race hails.  You are much more likely
to have experience traveling over a terrain from your home world, reducing
the cost.
SWIMMING: If you're in water, swimming becomes your means of movement.  It
costs more EPs the larger you are.
SKILLS: The various survival skills train you in moving through that
specific terrain, reducing cost.

Newbies do not suffer movement costs.