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.

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

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

Macabre astrological automaton clock dating to the late 1400s.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

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

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

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

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

Walk through Czech history in Prague's largest graveyard.

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

Looming communist pillar with a Czech twist.

Monument to a suicide protesting the Soviet invasion.

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

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

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

Tall columns of volcanic basalt make up this improbable-seeming rock formation.

This unusually shaped mountaintop tower looks like a UFO floating over the city.

Before serving as James Bond's Casino Royale, this Victorian-era spa catered to the world's elite.

Named after the German word for "a longingness to travel," this park brings together thousands of city and street signs from around the world.

A stairway to heaven, or to nowhere at all.

A giant snail sculpture looking longingly at the German traffic museum.

Go surfing on this urban wave, "hacked" by local surfers.