A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

This disastrous New Jersey safari park saw animal attacks, escapes, and disease before being abandoned.

This mouldering abandoned mental hospital was once a center for progressive healing.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

A train station that was abandoned by the coal industry and was later converted into a cocktail bar.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

A toxic ghost town sitting atop a massive coal fire.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

Standing guard on top of an old, vacant ice cream shop.

Abandoned concert venue legendary for its rock counterculture.

A Beaux-Arts triumph set to become Ford's innovation campus

38-story baroque tower reflecting Detroit's rise, fall, and possible rise again.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

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

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

Rusting away on the edge of New Jersey are the remains of a Cold War missile launch site.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

Failed state-supported institution meant to rehabilitate students with intellectual disabilities.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.