Once known for its horse-powered knife sharpening, this 200-year-old shop offers an array of blades and hard-to-find culinary tools.

In the world's oldest university is a stunning 17th century anatomical theater carved from spruce.

This zoological museum began as the first great curiosity cabinet.

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

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The world's largest reflecting pool is just two centimeters deep.

Inside this discotheque resides a unique memorial dedicated to one club-goers favorite pet.

A subterranean display of public art and architecture.

King Ludwig I's collection of beautiful women.

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

Walk through a restaurant's refrigerator door to reach this hidden bar.

A medieval military street hidden beneath a charming French fishing village.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

Venice's "Island of the Mad."

An iconic and eccentric bar for "Manouche" Jazz music keeps expanding its space—and its influence.

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

A mechanized clock where a man fights off a dragon, crab, and rooster.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.