The Land of Ooo is just The Land of Ooo. We can't quiet make out what continent it landed on, since half the earth is broken, and clouds block most of it, so it's quiet a mystery.This picture might help.......but no one really know what continent it's on.
My Theory: During one of the episodes Jake metions "The Great uyoga War" I think its uyoga has in "Mushroom Cloud" and uyoga wingu has in An Atomic Bomb, so Im guessing that Adventure Time is post-apocolyptic relating to the Gigantic Hole in the Earth and Finn and Susan Strong being the last humans
