Macabre astrological automaton clock dating to the late 1400s.

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

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

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

An Orwellian sculpture with eyeball cameras watches passersby.

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

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

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

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

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

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

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.

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

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

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

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

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

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

Looming communist pillar with a Czech twist.

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

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

Monument to a suicide protesting the Soviet invasion.

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