Two stunning 17th-century libraries and a cabinet of curiosities.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Countless grotesque faces stare out from this eerie Prague art wall.

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

A surreal statue honoring Prague's favorite literary son.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

This tunnel entrance is built to resemble a grand castle but no one is quite sure why.

Cold war icon and onetime "hole" in the iron curtain.

Named after a militant urban guerilla, this famous former squat is a graffiti-covered stronghold of leftist culture.

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

The most visited, and possibly most controversial, museum in Germany.

Ship-sized kinetic sculptural fantasy.

Eighty million natural history specimens call this gargantuan museum home.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The celebrated eyesore created by starry-eyed sweethearts.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

France's most famous cemetery, with some of its most curious tombs.

A 18th century graveyard and its astonishing cortege of macabre iconography.

This early version of the guillotine was used to execute the man responsible for its construction.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

A six-ton wedding present for the King of the Scots.

The tomb of one of Scotland's bloody historic villains is a magnet for bumbling desecrators.