For over 40 years, this quaint little house has teetered on a rock in the middle of a river.

This spaceship-like Serbian monument reaches for the stars in celebration of the fallen fighters of fascism.

A pair of connected skyscrapers form this symbolic gateway.

This memorial park stands on the site of one of the largest mass executions of the Second World War.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

Structure built from the skulls of vanquished foes.

Not quite the menace it once was, this monster still has some chops.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The largest and best-preserved rotunda in Prague.

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

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

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

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

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

A historic and beautiful Art Nouveau chamber in a historic railway station.

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

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

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

A significant example of Czech cubist architecture—a style you won't find anywhere else in the world.

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

Macabre astrological automaton clock dating to the late 1400s.

This spooky statue sits outside a famous Prague theater.

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

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