Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

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

This spooky statue sits outside a famous Prague theater.

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

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

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.

Macabre astrological automaton clock dating to the late 1400s.

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

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

A World War II evacuation tunnel turned into a history display of Croatian state and people.

This 135-year-old weather station studied the effects of the climate on human health.

A musical instrument played by the sea.

This abandoned Greek island was the last active leper colony in Europe.

This famous archeological mystery may be an ancient example of movable type.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

A small island with shimmering pink sands, home to loggerhead turtles and rare plants.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

A quaint medieval millhouse hovers surprisingly above the waters of the Seine.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

Fighting the British and making game shows for over 150 years.

For over 300 years this little carving has been the city’s good luck charm.