At night, this memorial illuminates a ghostly outline of a footbridge that connected two sections of the Warsaw Ghetto.

A pair of giant stone heads represent the ancient Roman saints beheaded here.

A 14th-century Serbian Orthodox church that was once converted into a mosque under the much-disfavored Ottoman Empire.

A UNESCO-protected spiritual seat of the Old Serbian Kingdom and Empire.

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

The most impressive of Basel's three remaining city gates.

A statue of an astronomer gazes at the sky as a tribute to Caroline Herschel.

This red light district plaza memorializes the Fab Four and their historic connection to the area.

A socialist building dedicated to teachers showcases one of the largest Soviet mosaics in the world.

A monastery considered a state-protected cultural monument of exceptional importance, founded in the 14th century by Serbian King Stefan Dečanski.

The best bagels in Berlin are tucked away in an independent bookstore.

Krakow's own version of the Hollywood Walk of Fame.

In the summer of 1957, a massive architectural exhibition showed off the future of urban living in this German neighborhood.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

Towering sandstone rock formations where 'The Chronicles of Narnia' was filmed.

The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

This cheeky statue of a man defecating gold coins graces the facade of a medieval guildhall.

A peculiar trapezoidal building covered with wonderful humorous reliefs.

This strange sculpture is an enigmatic icon of this medieval German town.

An ordinary lamppost situated in the middle of Cambridge has an unusual moniker and history.

An unusual artwork dedicated to a unique man that entertained people visiting Cambridge while raising money for charity.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

Numberless clock creates a meal of time for the dreaded, insectile Chronophage.

The Cambridge pub where Francis Crick announced that he and James Watson had discovered the DNA double-helix.