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

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

This infamous prison has a store where you can buy goods crafted by incarcerated people.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

The only bridge in the United States where BASE jumping is legal without a permit year-round.

This prison-turned-museum is a remnant of the Old West's grizzly, violent past.

Formerly Fire Station No. 27, the museum is a hidden gem in the heart of Hollywood.

This bank is widely believed to be the inspiration for the offices of Philip Marlowe, the hardboiled detective featured in a number of Raymond Chandler's stories.

World's largest collection of serial killer artwork and other macabre exhibits.

A chapel on a volcanic core, marking the end of a successful journey.

An underground blaze turned this village into a ghost town.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

A toxic ghost town sitting atop a massive coal fire.

The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.

The only thing better than tubing down New Jersey's scenic Delaware River is doing so while eating a hot dog from a giant floating stand.

A beautiful 62-acre Catholic shrine and botanical garden.

A walk through the historic city center, under the streets of Seattle.

The large fjord lake is thought to be the home of "Ogopogo," a giant sea serpent.

Cascading outward, this waterfall creates the appearance of a flowing veil.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

Prank calls to this place, originally the "Tube Bar," inspired the creation of a Simpsons character.

A simple plaque remembers an act of WWI terrorism that obliterated an island and forever scarred the Statue of Liberty.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

Once considered a marvel of engineering, this 107-mile canal played an integral role in building New York City.