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

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

This vast collection of smoking pipes from across the world spans centuries.

Amsterdam's Red Light District leaves little to the imagination.

This small museum located under the famous cube houses, is home to some 30,000 chess pieces.

A plaque hidden in the law faculty at Leiden University honors the first scientist to make liquid helium.

Small transmitter operated by a priest in the Netherlands.

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.

Elegant marble and old vaults fill this historic Dutch bank turned office space.

An impressive array of unique homemade planetariums.

Building Men of War and Indiamen from Holland's Golden Age.

A bizarre form of natural mummification was discovered in the church of this Frisian village.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

This cheese shop also houses a museum devoted to Dutch dairy.

A grassy pyramid named after a French battle.

Executed in 1401, Exhumed in 1878, Stolen in 2010.

An underground city of salt.

The largest toy museum in Poland showcases Europe's history of childhood.

This uber-quaint Polish village is known for its habit of painting elaborate floral motifs on just about everything.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

A monument in the Belarusian city of Polotsk claims to mark the exact midpoint of the European continent.