A reproduction of earth's many biomes.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

No one knows the meaning behind this giant sculpture of a nude woman with a fork riding a rooster in Havana.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

Unusual building appears to be haphazardly built from randomly piled bricks.

340-foot statue built to honour the Heroes of the Soviet Union.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

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

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

American soldiers discovered Europe's best one-liner at the end of World War II.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

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

The world's largest wooden structure.

Single runway interrupted by a busy road that cuts across its middle.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

Go inside to really appreciate this 500-year-old technological masterpiece.

The Guardian of Tallinn.

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

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Metro station with a claim to rock n' roll fame.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Climb inside an iron crystal magnified 165 billion times its normal size.

Amsterdam's Red Light District leaves little to the imagination.