Locals purchased this abandoned quarry in order to make sure it continues to be overgrown.

The ruins of a Massachusetts prison farm can still be found crumbling the woods of a state park.

This miniature feudal castle was built on a whim to honor a US Navy pioneer.

This mysterious artificial cave has long puzzled New Englanders.

Connecticut's shot tower is near the end of its life.

A tiny islet just off Long Island offers a wealth of infectious curiosities.

This cavernous abandoned marble mine is popular with ice skaters in the winter.

Stay at this storybook estate, featuring Sir Henry Hudson Kitson's masterpiece "Gingerbread House."

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

Ruins of a historic medical facility sits eerily by the water.

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

An abandoned gun-funded 19th century utopia.

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

Inside a state forest, the forgotten remains of a Cold War defensive installation.

Underground tunnels remain beneath this abandoned mental asylum.

This modern medieval weapon of war was built to toss pumpkins.

This decrepit abandoned building is made all the more eerie by its dark history.

A museum dedicated exclusively to the lore and history of ouija boards.

On top of Gibbet Hill lie the ruins of a lavish turn-of-the-century estate that never quite came to be.

The pleasant woodland cemetery that has inspired more than its fair share of wild legends.

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

The macabre graffiti spectacle in a quarry in a Massachusetts forest reservation.

At the supposed instruction of Ben Franklin and Socrates, a Spiritualist believer intended to birth a mechanical messiah here.

A cave dug by a man directed by ghosts to find pirate treasure.