This marvelous array is one of the largest collections of mechanical instruments in Europe.

The many—66 to be exact—faces of the German forest.

Every half hour the eye-rolling clock face sticks out its tongue to mock the good citizens of Koblenz.

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

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

This automated sculpture of two men peeing will spell out text messages with their micturition.

A mocking tribute to the past and modern leadership of Prague.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

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

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

This antique thermometer honors the creator of the first universal temperature scale.

The site of the first battle of World War II.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

Two well-hidden huts let animal lovers spend the night among the bears, wolves, and other predators of the forest.

Historic slum of Tartu.

This peculiar border irregularity is the only way to legally enter Russia without a visa.

The secret cells in the basement of the KGB's Estonian "Grey House" have been preserved as a grim Cold War museum.

This disappearing geyser has been attributed to witchcraft, but really it's all about rainfall.

Mysterious craters may have been home to an ancient cult.

"There's nothing there," and other lies the KGB told us.

A model memorial to the original Odin Tower, the second highest tower in Europe before it was sabotaged by Danish Nazis.

Bored potato-guarding Nazis etched their thoughts onto a brick storage building in Copenhagen's Meatpacking District.

This Denmark theme park is part family attraction, part experimental archaeology project.

A collection of noses tucked inside an art museum reveals how times have changed.