A triumphal steel arch on the side of a German mountain.

Medical history with an amazing, if frighting, collection of wax diseases on display.

The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.

This bakery and museum offers tours of the tastes and mythology of Aachen's signature spice biscuit—just don't ask for the recipe.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

A neighborhood church's unusual abstract stained glass was the final project of avant-garde artist Jean Cocteau.

Relive a Polish uprising via an enormous, century-old cyclorama.

The silly symbol for an underground protest group is now scattered around the city.

One of the world's heaviest musical instruments towers within a popular urban park.

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

The legend of a local monster still haunts this small town.

The only diamond mine in the world where you can keep what you find.

The highest point in Louisiana, Driskill Mountain at 535 feet above sea level.

One of the largest publicly funded mural in the country is one city's love letter to itself.

This 19th-century building inadvertently preserved the handprints of its builders within its walls.

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

Some North Carolina Cherokee have been keeping their history alive for decades with a single play.

While knives are the main feature in this store, visitors will also find dinosaur bones and meteorites.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

Baroque celebration of the end of the Great Plague of Vienna.

This massive statue is the personification of Bavaria and the first colossal statue of the modern period composed of bronze.

The modern birthplace of Irish freedom.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.