The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

Staves, storm-calling, and of course, necropants.

The ghostly remains of an accidental sea.

A toxic ghost town sitting atop a massive coal fire.

A church of bones, decorated with 40,000 human skeletons.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A one-of-a-kind collection of a unique medium.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A 16th-century horror show built in a lovely Italian garden.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

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

Dramatic river bend surrounds a natural red-rocked pedestal.

These fantastically named natural pools look like something out of a Scottish myth.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Most-visited and most-photographed slot canyon in the American Southwest.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

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

Armenian monks at an island monastery in the Venetian Lagoon make a rare rose petal jam.

This crumbling Art Deco movie palace in Mexico City has been abandoned for two decades.

A national collection of Communist-era musical posters.

One of the last of the great 1920s movie palaces is a Floridian Greco-Spanish-Persian dreamscape.