Flamboyant architecture from the turn of 20th century.

The statue of a legendary giant who carried Christ and shouldered the world's sins.

A stone marker and sculpture in the city of Riga stake a claim for the very first community Christmas tree.

3,000 market stands in five former Zeppelin hangars.

Latvia's symbolic mountain-shaped national library is home to millions of cultural tomes.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

Like Mars, but much closer.

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.