A musical instrument played by the sea.

This impressive collection of rare books on ancient mysticism inspired author Dan Brown.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

A unrivaled and rather horrifying collection of wax dermatological models.

Brussels' favorite peeing boy has a sister.

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

One of the most easily accessible examples of the rare 1960s UFO houses.

A museum in the building where Nazi Germany signed its surrender tells the story of World War II from the Soviet perspective.

King Ludwig I's collection of beautiful women.

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

The last bastion of Roman presence north of the Alps looms over a German town.

When a medieval fire claimed the original St. Stephen’s Cathedral, it sparked a pattern of unquenchable organ building.

One man's personal kunstkammer, museum and shop.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

The final resting place of many of Germany's most famous communists.

Visitors can explore the role of mysticism throughout the ages inside this interactive museum of magic.

This 8th-century Bavarian monastery is home to an exquisite Baroque-era library.

Housed in an old church, this hunting museum holds a collection of mythical bird-rabbit creatures.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

The footprint of a frustrated devil in Munich's Cathedral.

The great Danube river starts here.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

This little museum is making sure that the art and history of the graffiti sticker is not scraped from history.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.