Once home to one of the oldest banks in the world, this building is also where Marco Polo's famous travelogue was written.

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

The highest point in Washington state is a volcano covered in glaciers.

Art historians have debated the identity of this medieval stone rider since the 19th century.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

A hidden three-foot-wide house separates these two regal churches.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

Elaborate tile work in this railway station tells the story of Portugal.

This castle has links to Portugal’s founding and struggles for independence.

This airport currywurst stand is made out of retro airplane parts.

The telescope that discovered Neptune.

A museum dedicated Germany's favorite drink and most well-known festival.

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

An ornate sculpture of an ox in repose marks the former entrance to Nuremberg's medieval meat market, which was destroyed during World War II.

A museum that chronicles the history of the Nuremberg Trials for Nazi war criminals in the building where the trials were once held.

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

A subterranean display of public art and architecture.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

Giant topiary dog once played a role in a terrorist bomb plot.

This 19th-century fountain's namesake animal isn't what you think it is.

The final resting place of one of Germany's most accomplished Renaissance men.

This contentious squat has stood through fire, violence, and government intervention as a hotbed of leftist protest.

Where the lovelorn find a home for their sentimental keepsakes.

A World War II evacuation tunnel turned into a history display of Croatian state and people.