The remains of this 2nd-century Roman temple are incorporated into a modern building.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

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

The celebrated eyesore created by starry-eyed sweethearts.

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

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

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

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

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

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.

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.

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

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A serene desert oasis speckled with ancient artifacts.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

A gallery of underwater art that can be visited by man and fish alike.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

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

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

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