A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

A surreal museum of extraordinary industrial objects.

This massive subterranean fissure is known as the "underground Grand Canyon."

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

This bar and museum are devoted to the controversial comic book work of Kája Saudek.

The first museum in the world devoted to sexual gadgetry.

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

Fittingly, America's museum of architecture is itself a magnificently designed old building.

The romantic garden was the epicenter of the Hungarian art scene in the 1880s.

A Hungarian optometrist's charming collection of Asian art and curiosities.

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

The soulless eyes of 82 bronze children stare on forever in remembrance of a horrifying World War II massacre.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Budapest's Communist-era statues, banished to the suburbs.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

The studio built by fascists in the hopes of "reviving the film industry" with the occasional propaganda film opportunity thrown in.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.