A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

The fairy tale castle of the "fairy-tale king."

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

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.

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

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

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

An exquisite tunnel of cascading flowers.

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

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

An artsy hidden staircase leads to breathtaking views of San Francisco.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A huge musical instrument played by the ocean.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

The Neolithic megalith was one of the first archaeological ruins protected by the British government.

The last resting place of the famous Native American princess is marked by a haunting monument.

A treasure trove of astronomical, mathematical, and scientific instruments at Cambridge University.

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

London's marvelous wildfowl reserve along the Thames.

This historic club for wayward boys has shaped some of the biggest names in music almost as much as they have shaped it.

One of Oxford's greatest treasures likely belonged to the legendary King Alfred the Great.

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

A Neolithic burial tomb connected with a colorful array of legends.