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

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

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

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

France's most famous cemetery, with some of its most curious tombs.

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

An emerald-green grotto just a short trip from Austin.

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

A snapshot of the city's fascinating voodoo culture.

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

On the Oregon coast there is a natural hole that seems to be draining the sea.

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

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

World's first "penitentiary," meant to be humane, drove men insane.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

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

An exquisite tunnel of cascading flowers.

Rippling sand dunes frozen in the Arizona rock.

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

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

World's largest collection of serial killer artwork and other macabre exhibits.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

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