In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A psychedelic labyrinth on the San Francisco bay.

A huge musical instrument played by the ocean.

A carnivorous plant paradise in a serpentine bog.

The oldest house in Chicago certainly doesn't look the part and there are some who say it doesn't deserve its title either.