This historic Amsterdam bar used to accept sailor's monkeys as payment.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

This charming pup is meant to celebrate the youth and stubbornness of the city's students.

Rotterdammers' dirty minds gave this santa a dirty nickname and cursed it to a life of wandering.

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

Cozy basement bar sports an inventory of over 2,000 beers.

Brussels' favorite peeing boy has a sister.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Legends surround an ancient tree trunk riddled with nails for good luck.

A silly medieval mural preserved on the side of a Viennese house.

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

The final resting place for the remains of 143 Habsburg royalty.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

A Baroque mansion with ties to legendary magicians and alchemists.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

Macabre astrological automaton clock dating to the late 1400s.

The hidden lair of an alchemist rediscovered in a 2002 flood.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.