Location

Locations in World of Warcraft fall under several levels of classification:

To reference a certain location you can use coordinates or a map.
 * Worlds / Planes
 * Continents
 * Zones / Regions
 * Subzones / Sub-areas
 * Settlements
 * Instances

In the RPG
In the various incarnations of the Warcraft RPG, locations have more varied classifications that are less systematic and more resemble historical and geographical designations.