It's the place we live, dumbie. But I guess if you need an explanation that badly...
Earth was decimated in the Holy Wars of 2002.
Coincidentally, this was the same year Matthew Lillard starred in the live action adaptation of Scooby Doo.
Ever since, Earth has been comprised of five floating land masses and one sea gravitating around a molten core.
Each chunk falls into one of four major biomes. Each country and its biome is listed below:
Highlanderland - Victorian Steampunk as Presented by Speculative Fiction