This 18th-century sundial was designed to calculate the date of Easter each year.

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

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

A simple plaque on the facade is the only reminder that the treaty ending the American Revolution was signed inside.

The oldest continuously operating mint in the world that has been making coins since the 9th-century.

This small, ingenious cannon once helped regulate Parisian life.

Executions were once held near this beautiful 18th-century fountain.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

With a history of slaughter, feast, and famine, remnants of the pork industry decorate this area--even its church.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

The curious underground history of keeping Paris clean.

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

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

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

The video game-themed street art first popped up in the French city.

Europe's largest community of crocodiles and alligators.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Bloodstains can still be seen in this medieval church where two medics saved lives on D-Day.

These unique markers designate the route American forces took during the Liberation of France.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

The Lone Star plaque hangs in a bombed-out bunker in Normandy to honor a Texan colonel's heroic actions on D-Day.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.