The last of Amsterdam's original sea level markers remaining in place.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

A museum-like shop that has been producing clogs, brushes, and ropes for nearly 200 years.

The largest flower auction house in the world.

The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

This Belgian palace was long the domain of priests and aristocrats but is now being turned into an art commune.

Twisted buildings adorn the banks of the Rhine river.

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

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

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

The body of at least one victim of a construction accident was left behind in the collapsed pylon, buried under tons of concrete.

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

This German museum is devoted to all aspects of grave culture from headstones to coffins.

A two-inch thick solid brass rod that extends an astounding one kilometer straight into the earth.

A ruined castle stands atop a hill surrounded by dragon lore.

This fountain of a little boy that spits on passersby at erratic intervals is a town icon.

Centuries of warfare, tragedy, executions, and poetry come together in this 13th-century fortress.

A memorial for a young woman and her ghost, which are claimed to have caused countless deathly shipwrecks.

This tremendous timepiece was once the largest cuckoo clock in the world.

Legendary site where an evil bishop was devoured by rodents.

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

This Cold War–era fallout shelter was actually a storage facility for the nation's emergency currency.