World's first "penitentiary," meant to be humane, drove men insane.

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

An abandoned stretch of highway, deteriorating next to the operational one.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

The ruined remains of a coal mining ghost town are hidden within the woods.

This public space is speckled with the eerie remnants of a defunct amusement park.

The graffitied ruins stand hidden within the Pennsylvania woods.

This semi-spooky remnant of an abandoned hotel provides fantastic views.

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

A recently abandoned psych ward at the end of Sanatorium Road.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

An old abandoned mining town in The Adirondacks where Theodore Roosevelt first learned of the shooting of President William McKinley.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

A crumbling hospital from the 1850s on Roosevelt Island.

Toxic waste disaster that founded the Superfund program.

A ruined mansion hidden in the woods of the Hudson Valley, home of a tragically doomed romance.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

A millionaire's abandoned swimming pool from the gilded age of one of America's most distinguished families.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

An abandoned castle owned and ignored by Masons carries a cursed history.