The Earth is one five planes of existence in the Cosmology of Tartessos, and one of the three planes of the Middle World. It is the plane of mortal existence, consisting of the surface of land masses.
The Earth includes the Elflands, a physical country which is the chief of the fey places on the Earth, as well as other similarly attuned locations. The fey places are not considered a separate plane of existence, however; they can be located on a map and found in the physical world.
See also Geography.