A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

Kuwait City's uniquely designed water towers look straight out of a retro sci-fi cityscape.

This road earned its macabre nickname after hundreds of Iraqi troops died along it in 1991.

The world-record holder for the longest bridge stretching continuously over water.

The fifth-longest natural arch in the world, and the longest outside China.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This ghost town houses the remains of Alabama's old state capital.

This iconic 1958 tower welcomes air travelers to Tucson with neon-lit letters and architectural style.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

Legend says train robbers stashed their gold within the depths of this unusual cave.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

The final resting place of the famed German pilot, the "Red Baron."

This tremendous timepiece was once the largest cuckoo clock in the world.

This demon atop the Notre-Dame de Paris looks utterly bored.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.