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.

The largest pool at its elevation sits on top of one of the most expensive resorts in the world.

5,000 skulls in memorial to those killed by the Khmer Rouge.

Khmer Rouge's high security prison.

The design of the Palacio Salvo has been described as "a lighthouse on top of a building."

An unrecognized micronation declared by Greenpeace to protect the glaciers of Chile.

The southernmost Anglican cathedral in the world has whale bones standing in its yard.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

France's most famous cemetery, with some of its most curious tombs.