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

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

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

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

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

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

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.

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

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

This artificial cave looks like something out of a fairytale.

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

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

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

Walk through Czech history in Prague's largest graveyard.

Macabre astrological automaton clock dating to the late 1400s.

The hidden lair of an alchemist rediscovered in a 2002 flood.

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

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

Where visitors can play more than 150 retro arcade games.

Extremely famous in his native country, this Cracovian painter is all but unknown beyond Polish borders.

At first glance, this area seems like just another city park, but the lush landscape hides a dark past.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

A collection of modern and vintage pinball machines housed in the cellar of a 15th-century building.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.