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

A chapel on a volcanic core, marking the end of a successful journey.

One of the oldest masonic museums in Paris.

The world's largest reflecting pool is just two centimeters deep.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

Architect Le Corbusier built his friend a cubist house to match his impressive collection of cubist art.

These quaint French houses dangle precariously over a precipice.

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

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

Sleep in a climate-controlled plastic bubble for the night.

A well-preserved medieval village nested on a rocky outcrop and surrounded by a network of cliffs, natural bridges and canyons.

This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

This stunning natural double arch, the largest in the Alps, went undiscovered until 2005.

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

Beautiful carved tunnels.

The fantastic architectural models of a French traveler.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

Ghosts of France's colonial past.

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

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

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

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

A Gothic cathedral created from volcanic rocks.

Historic medieval fortified city in southwest France.