Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

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

Paris' linguistic guide to the international language of, yes, love.

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

Abandoned railway line circling the city of Paris.

The first green space constructed on an elevated viaduct.

A haunting collection of the vanished and disappearing natural world.

This museum houses an imposing skeleton army comprised of creatures great and small.

Hidden away in a modern library are the remains of one of the 18th century's most celebrated wunderkammers.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

France's high-tech, future-themed amusement park.

This anatomical sculpture raises awareness about violence against women and promotes gender equality.

The ruins of a medieval castle linked to the murderous French lord that inspired the famous legend of Bluebeard.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.