The world's tallest bridge is also possibly the most elegant.

This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."

The famous winding walk at Chartres is surrounded in mystery and myth.

Historic medieval fortified city in southwest France.

The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.

Skeletons, medical artifacts, and other obscure and precious treasures all displayed in a wooden pharmacist's cabinet.

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.

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

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

A cave dwelling that was started by the Celts, expanded by monks, and finished by knights.

One of the last umbrella repair shops in Paris upholds the nostalgic art of umbrella making.

Ancient paintings known as the "Sistine Chapel of Cave Art."

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.

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

One of the greatest maze designer’s greatest mazes.

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

Stroll through retro Paris while shopping for old postcards and discarded doll heads.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

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

Egyptian Revival movie palace abandoned for decades and restored in 2013.

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.