An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

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

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

The memorial to the victims of the Jonestown Massacre carries the names of 918 lost, including one name people wish wasn't there.

This World's Fair showpiece was built in Chicago, but shipped to Maine.

An unusually designed bridge from the 1920s was built to withstand the tides and winds of Maine.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

A derelict bit of transportation infrastructure hidden in the woods.

This tiny church near Sleepy Hollow contains Henri Matisse's last work, a rose window, and nine windows by Marc Chagall.

This once luxurious Catskills resort is now a haunting ruin.

This former theme park in New York's Adirondack Mountains fell into ruin before being resurrected as a state-run campground

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

This factory made "health corsets" that were a step towards liberating women's bodies.

The once abandoned ruins of a Victorian beachside amusement park are now back in working order.

A museum designed by and dedicated to P.T. Barnum in the town where he is buried.

A mysterious echo seems to defy the laws of acoustics.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

This throwback amusement park is home to rides and unique storybook figures from the past.

This lovely little pond is named after the hundreds of soldiers' corpses that were rolled into the waters during the French-Indian War.

This abandoned psychiatric hospital once housed more than 4,000 patients in the middle of a quaint New England town.