An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Once the center of power for the region's various factories.

Hidden underground, a remarkable 10th-century bath complex survives virtually unaltered.

A plaque commemorates a Victorian scientist's monumental discovery about waves.

One of Edinburgh's oldest pubs hides a 19th-century skittles alley in the back.

An American ghost town hides along a side street in Scotland's capital.

Inside this former medieval prison is a collection of objects designed to inflict unbelievable pain and suffering on the human body and mind.

Potato-peeling mannequins, Inca art, and a dangling tuber mobile help trace the history of fries at this Belgian museum.

From Coke II to Google Glass, this exhibit features some of the most spectacular commercial flops.

Eclectic collections, artwork, and some feline friends fill the writer's former home.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

A museum wholly devoted to juvenescence.

A historic house left in "dramatic still life."

This small museum in a former church crypt contains artifacts of the Elephant Man, Jack the Ripper and Florence Nightingale.

Ukraine's oldest operating pharmacy now offers guests a fascinating walk through apothecary history.

Quaint, disturbing, and macabre objects are all on display at this intriguing collection of medical instruments from bygone eras.

Early habitat dioramas and home of the elusive gaff, the skvader.

The library's graceful rotunda is like a bibliophile's temple.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

Walk through Czech history in Prague's largest graveyard.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.