Beetlejuice

 There is the waiting room (and really most of the afterlife) in Beetlejuice. In Marvel comics, Limbo is a plane outside time, ruled over by a future version of Kang the Conqueror called Immortus. Harry’s post-death King’s Cross in Harry Potter has elements of Limbo, as does the Void space in Doctor Who.

This image is a still taken from the film Beetlejuice.

Limbo isn’t an official Catholic doctrine, and it never really was. But it’s fascinating to see how far reaching a religious concept can be—especially to the point where it has basically lost its religious connotations and is understood by pretty much anyone you talk to, regardless of affiliation or belief.