Synagogue built from the stones of Solomon's temple contains the golem of Prague.

A surreal statue honoring Prague's favorite literary son.

This spooky statue sits outside a famous Prague theater.

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.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

The holes in this wall provide a glimpse into Jewish life in Budapest, both past and present.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

Bridge that died in war and was resurected.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

This monumental fountain has moved around the city multiple times.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

St. Francesca Romana, patron saint of drivers, resides in the church she founded.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

This is the oldest Roman-made bridge in the city still existing in its original state.

Wall after wall of this French seaside neighborhood is intricately decorated with seashells and corals.

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

France's national museum of scientific and industrial instruments.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This sculpture pays homage to the street sweepers of Madrid since its inauguration in 2001 in Plaza Jacinto Benavente.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.