All that is left of this medieval castle is two towers, both of which now display a visible tilt.

This colorful palace is an oasis of calm amid the hustle and bustle of the Buriganga riverfront.

Sail in for a ’dam good slice.

The remains of this misplaced church were moved here stone by stone.

The ruins of a military-industrial complex now host concerts and more.

This 8th-century Bavarian monastery is home to an exquisite Baroque-era library.

An eerie maze of industrial factories looks like something out of a dystopian sci-fi.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.

The palace for King Gustav III was never completed, but the foundation remains tucked away in this city park.

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

How a lunch counter in Chile became a shrine to the 42nd president of the United States

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

This Art Deco fortress in upstate New York gives Manhattan's vaunted examples of the style a run for their money.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

This lake’s emerald green waters are a spectacular sight, but it’s not a great place for a swim.

This ancient village provides insight into the complexity of the pre-Columbian Fremont Culture.

The once-booming fox ranching industry has left its mark on Prince Edward Island.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.

Curious onlookers have suspected this strange structure is a secret government base.

This unique medieval artwork featuring the story of the Antichrist remained lost for decades.

One of the tallest waterfalls in Africa is also home to a population of monkeys who enjoy the waters and the occasional guest.

The sophisticated hydraulic system of the Nazca civilization.

A massive bur oak tree believed to be some 500 years old is the centerpiece of this quiet urban greenspace.

A medieval house with mysterious alchemical inscriptions on its facade