A hidden three-foot-wide house separates these two regal churches.

This giant sculpture made of trash is a critique of society's wastefulness.

His "Lionheart" is entombed separately from the rest of his body.

An ancient ossuary in Rouen.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

In 1927, a biplane disappeared while attempting to complete the first non-stop transatlantic flight between Paris and New York City. This memorial stands at the last place it was seen.

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

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

From Carthage's Hannibal to riders of the Tour de France, many have crossed this scenic route through the Alps.

A breathtakingly steep set of stairs is carved directly into the face of the sea cliffs of Bonifacio.

Southern Italy's spinning top village.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

Five candy-colored villages on the Italian Riviera.

Tens of thousands of ancient rock carvings hidden in the heart of a French national park.

A fortress on this island housed the mysterious prisoner known as the "Man in the Iron Mask" for more than a decade.

The castle where the Marquis de Sade lived out his darkest fantasies.

Avant garde house of Pierre Cardin on the Cote d’Azur.