This statue was given to France by the United States to commemorate the centennial of the French Revolution.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the 20th century.

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

Notorious artist squat renovated into legal studios.

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

An ancient Egyptian temple in the middle of Madrid, Spain.

Legend says this sacred tree was a gift from goddess Athena.

A sharp sculpture made of thousands of pieces of jagged glass.

An ancient octagonal weather station named for the eight Greek gods of wind.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

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

A 12th-century fortress containing some of Berlin's oldest buildings.

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

This quiet, unassuming spot in Budapest was the birthplace of the bloody 1956 Hungarian Revolution.

The metal leaves on this tree are engraved with the names of Holocaust victims.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

It's good luck to be mocked by this monkey.

A preserved college lock-up that recalls a clubhouse approach to discipline.

The oldest statue in the Netherlands has survived relocation, bombardment, and burial.

The oldest skyscraper of Europe now stands dwarfed by the surrounding structures.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

Brussels' favorite peeing boy has a sister.