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

The sign at the garden gate reads: "These Plants Can Kill."

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

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

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Tucked in the back of this amazing antique store is an important piece of medical history.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

A psychedelic labyrinth on the San Francisco bay.

Rippling sand dunes frozen in the Arizona rock.

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

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

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

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

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

Abandoned ship reimagined as a street art canvas.

A hidden tunnel leads to an abandoned slate quarry that's now a secret swimming spot guarded by cliffs.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

An unexpectedly extraterrestrial room in a former Victorian resort club.

This Welsh hotel is the spiritual home of the British 1953 Everest expedition, the first successful ascent of Mount Everest.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

This neolithic stone grave has been altered and restored so often its now more neo than lithic.

Legends say that this small island was the final resting place of the Welsh saint of lovers.

These haunting ruins belong to an ancient village that once had one hell of a view.

The sculpture is made of more than 100,000 knives collected to raise awareness about violence.