These massive moving sand dunes have swallowed an entire village and are still on the run.

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

This vertical pinnacle in China was the inspiration for the floating mountains in the movie “Avatar.”

The latest in a series of long glass bridges suspended at terrifying heights.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

The site of the climactic scene from the classic horror film is now a historic landmark.

According to a satirical conspiracy theory that persists today, this German city of 300,000 is a hoax invented by the CIA.

A showcase of canine neckwear spanning five centuries of doggie fashion and function.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A chaotic collection of maritime artifacts, art, and really whatever else happens to be around.

A unique collection of Science Fiction, Fantasy, and everything in-between.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

This large collection of tiny things revels in the art of fine machinery well made.

A bizarre house filled with an astounding array of collections.

The oldest building in Vancouver's Chinatown is now home to one of Canada’s largest contemporary art collections.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

This Danish castle is supposedly haunted by a woman too independent to not be a witch.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

A centuries-old complex of hand-dug stone chambers has sheltered locals in times of trouble.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

Modern design and unusual architecture make this mountaintop temple no ordinary Buddhist retreat.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.