A surreal statue honoring Prague's favorite literary son.

Steadily reminding Czechia of its past.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

This automated sculpture of two men peeing will spell out text messages with their micturition.

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

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

Walk through Czech history in Prague's largest graveyard.

Countless grotesque faces stare out from this eerie Prague art wall.

An existential riddle in the world's largest ancient castle.

A church of bones, decorated with 40,000 human skeletons.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

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

Macabre astrological automaton clock dating to the late 1400s.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

This stunning concert hall has become a symbol of Iceland's national recovery.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Commonly acknowledged as the only public monument to the Devil himself.

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.