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

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

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

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

This artificial cave looks like something out of a fairytale.

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

This spooky statue sits outside a famous Prague theater.

Macabre astrological automaton clock dating to the late 1400s.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

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

Looming communist pillar with a Czech twist.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

Walk through Czech history in Prague's largest graveyard.

A massive, abstract lookout tower providing a panoramic view of Prague.

An Orwellian sculpture with eyeball cameras watches passersby.

Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

Monument to a suicide protesting the Soviet invasion.

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

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

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

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

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

One of the famous Czech artist's lesser-known Prague installations appears to be a glowing fetus affixed to a drainpipe.

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