This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

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

On Japan's Tashirojima Island, cats are king.

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

Hot springs monkey spa in the middle of Hell's Valley.

Rippling sand dunes frozen in the Arizona rock.

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

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

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

Resting place of Hollywood's immortals is also site of summer film screenings.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Dramatic river bend surrounds a natural red-rocked pedestal.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

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

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.

The headless bodies of more than 1,300 guillotined victims of the Reign of Terror are buried here in mass graves.

The recovered bones of martyrs slaughtered during The Terror are on display in this church crypt.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.