Coventra is the world where Unicorn City is set. (Specifically, Unicorn City is set in Aathenaar, one of the southwestern cities.)
For your orientation-related amusement, we offer this map of Coventra.
Click on the map for a larger version, or see details of the northwest (including beautiful Pinge Canyon), northeast (home to the famed Salty Shemork Lake), southwest (where you’ll find Aathenaar) and southeast (dominated by the Paquerine Swamp).