Monument to a suicide protesting the Soviet invasion.

A former squatter's paradise outside Prague.

A bus with a butt and biceps to put Olympic athletes to shame.

A crucified and bearded female saint.

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

A series of playful yellow penguins share a serious message about the environment.

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

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

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

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

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

This artificial cave looks like something out of a fairytale.

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

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

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

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

This massive collection of taxidermy is full of specimens collected by missionaries during their international travels.

This small gallery nestled inside an old botanical glasshouse is a quiet place to enjoy art and nature.

Tucked away in a small German apartment is an eclectic museum devoted to West African vodun culture.

Twisted buildings adorn the banks of the Rhine river.

A varied collection of brains in alcohol.

This "floating railway" is one of the world's oldest monorail systems.

This painted Lego bridge is the product of over a century of locomotive history.