The entrance to this sinisterly named tunnel hides behind a Tim Hortons.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

An abandoned water sports stadium that has become a haven for graffiti and decay.

An abandoned vacation home spent a decade taking on legends. It's now taking on water.

Where manatees are the snowbird vacationers in these balmy Florida springs.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

This simple frog painting created by musician Daniel Johnston embodies the spirit of Austin.

This old abandoned sign flickers to announce a motel that isn't even there.

255 feet of suds, scrubbers, and blow dryers.

A medieval castle in the middle of rural Texas.

A master plumber has turned his love of art and toilets into a folk museum that's not taking the piss.

This crumbling UFO is one of only a few remaining "moveable ski chalets" of its kind.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

A popular swimming hole that hides one of America's most deadly diving spots.

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

The bones of an old zoo crumbling in the shadow of a new one.

This sprawling bookstore spans four floors and has more than a million books in stock.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

Some of Arizona's best spit-roasted tacos al pastor can be found at a weekend swap meet.

From working out of his garage to the James Beard semifinals, one Tucson baker has kept his fan base—and his grains—local.

An immersive art experience built by local arts collaborative, Factory Obscura, in the building formerly known as The Womb, a psychedelic arts center founded by the frontman of the Flaming Lips.

The fictional star of "Breaking Bad" is memorialized with a real-life gravestone in his hometown.

Life-sized sculpture of a blue whale made of hand-recycled plastic trash.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.