This former medical factory gives home to cutting edge arts in the shadow of a gas works.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

An ancient monastery, a locked room, and a mysterious book heist.

This store is dedicated to unique found footage and the strangeness of pre-internet pop-culture.

L.A.'s oldest operating bowling alley is a beautifully restored homage to its speakeasy days.

A surreal statue honoring Prague's favorite literary son.

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

The last municipal pneumatic post system in the world was in operation for over 100 years, and may run again.

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

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

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

Macabre astrological automaton clock dating to the late 1400s.

A Jenga-style cylindrical tower of books that appears to go on forever.

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

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

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

Press 1 for knock-knock jokes.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

The final resting place for the remains of 143 Habsburg royalty.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

Handsomely crafted representations of our round planet.

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

Inside the corridors of this flea market, visitors are sure to find some obscure and odd treasures.

A neo-Gothic mansion now houses a wunderkammer of analog tech that hits on all the senses.