Hundreds of numbered stakes hidden in the woods mark the graves of the lost souls of a nearby asylum.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

The remains of a 19th century spring, and the site of an infamous unsolved murder.

The Cadillac Ranch for monster truck aficionados.

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

A rare view of a preserved Victorian science museum.

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

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

This once luxurious Catskills resort is now a haunting ruin.

Hundreds of skulls and bones at the largest skeleton museum in the country.

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

This tiny New Jersey village has lived many lives but seems determined to remain a ghost town.