An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

A memorial to the murdered Jews of Kaunas.

This unique bridge physically lifts a piece of the road into the air to let boats pass by.

Rotterdammers' dirty minds gave this santa a dirty nickname and cursed it to a life of wandering.

The world's first interactive human body museum also serves as a chair for a giant orange man.

The attic of a four-century-old canal house hides a clandestine church.

Building Men of War and Indiamen from Holland's Golden Age.

This giant radio telescope would be a rusting ruin if it hadn't become such a beloved relic.

This imposing tower named after the mythical sword of King Arthur is considered the tallest freestanding climbing wall in the world.

Op-art architecture designed for happiness.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

The oldest operating pharmacy in the world features 800-year-old recipes.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

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

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

Secret refuge and museum of the Duke of Florence.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

Baroque celebration of the end of the Great Plague of Vienna.

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.