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.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

A psychedelic labyrinth on the San Francisco bay.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

One of the ghostly stops along Route 66.

Once a place of peaceful repose, this sanitarium now faces an uncertain future.

This vintage car parts store is also a museum devoted to a squat little gem of automotive history.

The only museum dedicated to the history of the "Magic Lantern," a medieval slide projector.

A tall smoke stack and boarded-up buildings are all that's left of the pioneering plant.

Ruins of a once-opulent grand Victorian resort.

With print dying, this local paper keeps the lights on by doubling as a stunning cafe and cocktail bar.

This soda factory is one of the last in America to use real cane sugar despite the protestations of Dr Pepper.

A 24-hour vending machine restocked daily with homemade full-sized pecan pies.

Alongside this Memphis trail are several sculptures that show trail-goers how to relax.

This rustic old building is said to be the most photographed barn in America.

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

A giant toy jack made of numerous welded-together fire hydrants.

A lonely memorial to the Challenger Space Shuttle, honoring the astronauts who died in 1986.

An artist sees trees as a medium for sculpture.

A small chapel celebrating the spiritual bond between dogs and humans.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.