The medieval "Bearded Man" relief still serves as a clever flood warning marker.

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

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

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

The accidental discovery of this gilt bronze head led archaeologists to find the Roman Baths in the city of Bath

Monument to a suicide protesting the Soviet invasion.

Dedicated to the man who saved hundreds of children from Nazi-occupied Czechoslovakia.

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 quasi-futuristic roof sits atop a medieval Bohemian monastery damaged during World War II.

A Baroque mansion with ties to legendary magicians and alchemists.

Be(w)ar(e) the moat around this historic Czech castle.

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

A half-buried vehicle in Prague's is the latest iteration in a long-running piece by Czech artist David Černý.

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

Local folklore claims that this wall was not built for defense, but to provide labor during a time of famine.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

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

The oldest garden in Prague, once part of an medieval orchard.

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

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

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

A grumpy old water goblin guarding an old mill on the Devil’s Stream in Prague.

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