Located on San Francisco's Pier 39, this black-light-lit maze is quite the challenge, and probably one of the only places you'll ever be able to find yourself in two places at once.

Mirrors don't absorb light, so when they're placed on a wall, they render that wall invisible. Because a mirror maze features mirrors on almost every wall, visitors have a hard time telling what is actually a wall and what isn't, causing them to bump into their own reflection.

Visitors can spend hours trying to make it through the maze, bumping into their own reflections.