This tranquil urban park has a violent history.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

A controversial art piece that harkens back to local folklore.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

This little patch of Europe remained neutral for more than a century because of a mine.

The tallest mountain in mainland Netherlands isn't actually very tall.

A beautiful maze marks where three countries meet.

A stunning gilt bronze relief denounced by Hitler as "degenerate art"—even though it was dedicated to the Nazi leader.

One of the oldest wine cellars in Germany is now a restaurant beneath Bremen's town hall.

A spitting ode to a German serial killer.

Twisted buildings adorn the banks of the Rhine river.

This futuristic German television spire is actually the world's largest digital clock.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The oldest remaining frame residence in Minneapolis.

A damaged tree turned into a whimsical giant pencil that is sharpened each year.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

A museum in the building where Nazi Germany signed its surrender tells the story of World War II from the Soviet perspective.

Cages that once displayed the bodies of executed leaders hang from a German church tower.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

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

A fascinating insight into daily life in the Eastern Bloc.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

A thin golden line commemorates the deadliest terrorist attack in recent German history.