A giant interactive periodic table with real samples of the elements.

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

A crucified and bearded female saint.

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

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

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

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

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

This artificial cave looks like something out of a fairytale.

This doorless 20th-century elevator doesn't stop or slow down.

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

What looks like a suicide in progress is actually a statue of Sigmund Freud.

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.

No one knows the origin of this creepy little stone man with an oversized phallus.

A cableway for car transport.

An extraordinary museum devoted to the pop art legend created by Slovak artists.

Inside the Šomoška National Nature Reserve exists a unique rock formation rarely seen in the world.

A unique hotel for the artistic soul.

This outsider art house has gone from clinical creation to astounding artwork.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

Artfully arranged bones of 5,800 Austrians.

Where beer lovers can literally immerse themselves in beer.