A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

Smoked mummies housed in mountainside caves.

An abandoned 1920s-era stretch of cabins now overshadowed by the 66 Motel.

A Spiritualist house of worship where believers communicate with the dead in the spirit world.

This odd 1930s shop remains stranded in time and shrouded in mystery.

This water tower slanted at an uncomfortable angle off the old Route 66 was an ingenious marketing ploy.

A deteriorating 1990s Girl Scout camp in a beautiful lush park on Lake Ontario.

A town church once nearly submerged by the damming of a river is now hauntingly visible as the water recedes.

An isolated dive site teeming with cnidarians.

Eastern Bloc nostalgia, anybody?

This railroad magnate's 19th century tower is more than a little bit out of place in the Nevada desert.

Now isolated, this church was once the center of a bustling village that succumbed to the Black Death.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

This tiny Minnesota city tried to secede from the Union as a last-ditch effort to fix its crumbling water system.

The only land territory disputed between the U.S. and Canada.

A vast Communist-era exhibition space in the Bulgarian capital.

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

The only surviving prototype for Buckminster Fuller's house of the future.

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

An eclectic art form practiced by untrained masters is celebrated at this museum in the heart of Zagreb's old Upper Town.

Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

A beautiful, dense forest in the shadow of Mount Fuji, with a tragic reputation.

This small museum in a former church crypt contains artifacts of the Elephant Man, Jack the Ripper and Florence Nightingale.