The unusual clock on this 18th-century market building has an extra minute hand for "Bristol time."

Stonehenge has nothing on Castlerigg’s views.

Museum celebrating the history of computers, especially their role in codebreaking.

Home to Alan Turing, the cracking of the Enigma code, and Captain Ridley's shooting party.

A visionary Italian architect created an impressive cluster of concrete structures for a family's private tomb.

An open-air museum in a mountain valley features works designed to blend in with—and disintegrate back into—their natural surroundings.

An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

A museum in England’s Lake District dedicated to the trusty pencil wants you to know the story of their World War II spy pencils.

A glacier pocked with ice caves and surrounded by rainforests.

The Bristol Camera Obscura housed in an ancient windmill.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

Before there were doorbells this bronze ear was installed for visitors to announce their arrival.

An ancient artistic garden parlor full of hidden water wonders.

A formerly opulent Italian village is now a crumbling ghost town that no one really knows what to do with.

This military mausoleum captures the solemn grandeur that most memorials only aspire to.

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

Massive galleon from a box-office bomb docked in Genoa.

The mark of the Devil's horns on a marble column in Milan.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

The glacier tucked within a New Zealand rainforest.

A New Zealand communications tower stands as the tallest structure in the Southern Hemisphere.

This sheep farm has been forever transformed since being built for “The Hobbit” film series.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.