Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Berlin's old airport.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

Where once there was a train station bathroom, there is now this German burger joint.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Macabre astrological automaton clock dating to the late 1400s.

Famously misunderstood wonder of the ancient world

A walk through the historic city center, under the streets of Seattle.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

The world's only museum devoted to the wonders of fluorescence.

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

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

A small but immensely extravagant palace built by the "Night King."

Go surfing on this urban wave, "hacked" by local surfers.