This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

The abandoned coal loading dock is a canvas for unsanctioned art.

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

The oldest surviving botanic garden in the United States.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

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

A wrecked ship dating back to the American Revolution was only recently discovered off the Delaware coast.

What began as an art installation is now the private drinkhaüs for a brewery's employees.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

This former asylum for Black Americans is haunted by its history of violence and racism.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Explore the legends surrounding these mythical sea creatures inside this museum.

A state park that once served as an important river crossing, and now offers protected lands for endangered plants and animals.

This ruined quarry once produced the distinctive red sandstone used for construction projects in Washington, D.C.

An isolated island home to one of the oldest English-speaking communities in the region and Maryland's state dessert.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

A remarkable time capsule of American manufacturing deep in Maryland coal country.

This abandoned Victorian-style house was built in 1884.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.