Come on grab your friends!
I've been watching a lot of Adventure Time! lately and thinking the Land of Ooo and Zarth have some similar vibes. Both are fraught with weirdness; both have bizarre locations galore; and both have remains of lost civilizations scattered about. Granted, the same can be said for many fantasy settings, but –apart from the plethora of nonhumans in Ooo– I can see Zarth as a darker and slightly weirder humanocentric shadow of where Jake and Finn get mathematical on evil-doers.