Underdark

This large cave system isn't just a hollow in the earth it is a different plane and access to it isn't just a case of digging downward there are specif entrances that can be used to pass in and out of the Underdark. This also means that the points of entry don't always match up geographically and so traveling a short distance within the Underdark can equate to much grater distances traveled on the surface.
There are a number of dark counter parts to races that live on the surface such as Drow, Duragar and Deep Gnomes but also a number of other sentient races like Illathids, Myconid and Drider, Tieflings have set up a considerable presence within in the Underdark after the Demons of Zilcan began to exterminate them in response to the Cad'Lear Rebellion.
Category:Planes