Luckily fans of The Wizard of Oz will still find plenty of allusions to the production that starred Judy Garland as Dorothy, the girl with the ruby red slippers.
Those aren't the only references, however, as you'll come across allusions to plentyof science fiction and horror works such as The X-Files, The Shining, Beetlejuice, The Sixth Sense, and (of course) Ghostbusters.