These regions of the world are available for player creation:
The moons: players may choose beings from the Moons in any era except the Dying World.
The skies: the floating continent of Gyrah is present in all eras except the Dying World and Early Mortality. It rose up during the Antediluvian Era.
The surface of the world: present in all eras, this is where most people live, you know, on the continents and so on.
The high seas: present in all eras, but only applicable during eras where sailing is a known and present technology. Antediluvian Era to Far Future.
Under the sea: mortals have always dwelled under the seas, since there are mortal species that dwell there, but those species that do not naturally dwell there may be able to dwell there from the Antediluvian Era onward. Not available during the Dying World era.
Subterranean: mortals have always dwelled underground in some fashion. This where most dwell during the Dying World.
Consult the GM for which species are available from which region.