Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

Alexander Hamilton’s creation caused quite a bit of controversy.

Yo, Adrian!

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

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

The world’s first penitentiary, meant to be humane, drove men insane.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

The fastest transatlantic ocean liner sat abandoned in a Philadelphia shipyard for decades.

A former copper mine which became a truly unsuccessful prison.

Books you don’t need in a place you can’t find.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

This strangely amalgamated museum explores the history of the Timex clock company as well as archaeology.

After decades of neglect, a brutalist icon is getting new life as an eco-friendly hotel.

This monument commemorates an aeronaut who allegedly flew a plane before the Wright brothers.

The last vessel built by a submarine pioneer stands as a monument to his legacy.

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

A terrific purveyor of natural history objects and curios.

The oldest still-operating tavern in the United States was once owned by a pirate.

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

A toxic ghost town sitting atop a massive coal fire.