This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Where America's first doomsday cult awaited the end of the world.

Mysterious rocks that ring musically when struck.

Once forgotten, this strip of sand was a rare beachside haven for Black Americans in Atlantic City.

If it feels like a speakeasy, that’s because it probably was one.

Hidden deep within New Jersey Pine Barrens is a massive graffiti wonderland.

This unassuming retro burger joint was billed as “diner of the future” at the 1939 World's Fair.

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

Step into Monet's world at this fine-dining restaurant in the middle of a New Jersey sculpture park.

The remains of an old sawmill, gristmill and the surrounding industry dating back to the 18th century.

Once the world's largest reinforced concrete structure, this abandoned bridge now beckons urban explorers.

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

This Boy Scout retreat acted as "Friday the 13th"'s original Camp Crystal Lake.

A reservoir of vintage pinball machines and arcade games for the nostalgic and thrill seeking.

Step inside Lucy, the world's largest "elephant."

Series of storm drains connected to a dark urban legend.

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

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

Decommissioned NYC subway cars are dumped into the ocean to create this underwater wildlife habitat.

The Dover International Speedway is home to a towering, concrete-skinned, racecar-hungry behemoth.