A French artist's vague warning hangs over Belleville.

This bridge was constructed from the rubble of the infamous Bastille.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

Pitié-Salpêtrière was the dumping grounds for women who received the dreaded diagnosis of "hysterical."

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

The first green space constructed on an elevated viaduct.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

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.

This modest marker near Notre Dame identifies the very center of Paris.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

This tiny lake temple dedicated to a water goddess seems to float on the surface.

God's Saharan sandbox of wrath.

One of the most spectacular canyons in the world.

World's largest film studio, where visitors tour the decaying sets that litter the harsh desert environment.

A fortified city, home to a remaining population of five families

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.