A self-built mosaic house and sculpture park.

There has been an astronomical clock on this spot since the 14th century.

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

One woman's decades-long obsession with the "La Fée Verte."

Since ancient times these picturesque springs have been providing bathers with healing waters.

An ancient monastery, a locked room, and a mysterious book heist.

Museum in a swimming pool where the water still flows.

Walk through spectacular aisles of hanging meat and wagon wheel–sized cheese at the world's largest wholesale food market.

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

Ivy-covered Medieval tunnels cut through this charming town in France's Loire Valley.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

Beggars were miraculously "cured" of their fake ailments when they returned home to this 17th century Paris slum each night.

Beautiful carved tunnels.

The narrowest street in Paris.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

Two small chapels housed inside an ancient tree.

A public park off the beaten path with a beautiful waterfall and 13th century Cistercian abbey.

This stunning French estate was so lavish that it landed its original owner in jail for the rest of his life.

Monsters and miniatures are held in equal esteem at this wondrous museum.

The fantastic architectural models of a French traveler.

A mosaic-tiled house built by graveyard sweeper Raymond Isidore.

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

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.