A fifth-century temple improbably built into the side of a cliff.

This sacred cavern, 400 feet deep, is home to millions of bats and an ancient burial ground.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

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

Given just one more year to live, Conrad Schuck built his dream house in Bartow, Florida.

Site of a famous 19th-century transcendentalist utopian community, now abandoned.

The strange phenomenon causing gravity to "work backwards" on this hill has been blamed on the paranormal.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

This abandoned Civil War fortress is slowly being swallowed by the waters of Lake Borgne.

A battle between nature and architecture in the Cambodian jungle.

If astronomy had a ghost, it would look like this observatory.

The only Florida state park with publicly accessible caves.

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

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

These azure waters were thought to lead to the Mayan Underworld.

A volcanic tunnel illuminated by natural skylights offers a shaded respite from the desert sun.

A number of gruesome unsolved murders have turned this simple home into a morbid tourist trap.

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

A taste of Middle Earth, in the middle of the Bayou City.

The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

A well-preserved network of cavernous tunnels have spent silent centuries removing Toronto's waste.