I don't know why, but I got to thinking about Pan's Labyrinth today. For some reason, nobody ever seems to talk about it, yet I actually consider it among one of the better, unique movies I've ever seen. It's definitely strange, and DEFINITELY not a "feel-good" movie, but it just really left an impression on me, for some reason.
What are some other great, but often-overlooked movies? Something that either never got much exposure, or that "everyone's heard about, but nobody's ever seen"?