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

A huge Megalithic chamber tomb located behind a cafe.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

A massive, secret marina for the Nazis' most formidable weapon in the Atlantic.

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

What looks like a normal building is really a hollow facade hiding a subway vent.

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

The oldest and smallest cemetery in Paris is only open to the public twice a year.

A Gothic cathedral created from volcanic rocks.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

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

The narrowest street in Paris.

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

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.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

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.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.