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

A Portuguese Jewish cemetery filled with stunning grave monuments that date back to 1614.

A beautifully eclectic mix of architectural styles.

Monasteries on rock pillars, once accessible only by frayed ropes.

One of the world's largest collections of pharmaceutical artifacts.

A tiny rural community in Switzerland was home to one of history's most shocking murders, and led to the banning of Absinthe for nearly a century.

The World Wide Web was created in this nondescript corridor at CERN.

Extensive private collection of authentic Medieval devices used for human torture and execution.

An 11th-century fortress home to one of the most influential royal houses in medieval Europe.

This small museum displays a collection of outsider art and scale models of past "treatments" for mental illness.

This simple apartment may have inspired some of the most important theories in the history of science.

A Swiss board game museum housed inside a picture-perfect castle.

At 929 pounds and 26 feet tall, this stainless steel fork can only be used by the likes of King Kong.

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

Caves famous for the dragon-slaying saint who lived there.