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

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

Europe's official "zero-level," the equator of elevation.

A floating cat sanctuary on an Amsterdam canal.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

A 200-year-old tavern challenges guests to finish a glass of wine while hanging from a ceiling beam.

This museum is known as the "Land of the Dinosaurs," but its full-scale dino models are just the start.

Europe's largest dinosaur museum was founded by a passionate autodidact.

This unique exhibit "Dialogue in the Dark" reverses roles as the visionless become guides and the sighted become ‘blind.’

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

These 18th century gardens tell a rocky story of the son of Odysseus.

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

A church filled with the bones of hundreds of virgins martyrs—or so they say.

"The most colorful grottoes of the world.

This "floating railway" is one of the world's oldest monorail systems.

A striking 12th-century-style castle built on the edge of a cliff.

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

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

The most visited, and possibly most controversial, museum in Germany.

An eerie, derelict amusement park in Berlin.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.