The site where two doves fell in love.

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

This demon atop the Notre-Dame de Paris looks utterly bored.

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

A surrealist timepiece by the artist of melting clocks.

The narrowest street in Paris.

This 400-year-old tree is actually an immigrant from North America.

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

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

The French leader's hat sits in a glass case at the oldest restaurant in Paris.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

Where the high court feasted, frolicked, and high courtesans put their royal lovers' diamonds to the test.

The approximate spot where the last Grand Master of the Knights Templar was put to death.

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

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

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 largest medical and anatomical collection in France lies hidden from the public.

Marie Antoinette and Napoleon Bonaparte were fans of this 200-year-old French chocolatier.

A glamorous hotel that once accommodated French resistance fighters and concentration camp survivors.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

Saintly bones pressed into a wax effigy of a Catholic superstar.

This mural painted by Keith Haring was done without payment as a gift to entertain the children at the Hôpital Necker.

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.