Underworlds of Oz is a scare zone that debuted for Fright Fest Extreme at Six Flags Magic Mountain. It is a dark take on the fictional Land of Oz from the 1900 children's novel The Wonderful Wizard of Oz by L. Frank Baum. The scare zone is located in the Screampunk District and replaces the previous zone in that area, TERRORtory Twisted.