Nearly every wall in this French villa has been "tattooed" by artist Jean Cocteau and other famous painters.

A place to see how French aristocrats lived in the early 1900s.

This 18th-century sundial was designed to calculate the date of Easter each year.

Claude Monet was baptized in this lavishly ornate Paris church.

Guests can stay at a hotel in the former French abbey where lie the tombs of King Henry II and King Richard the Lionheart.

A huge Megalithic chamber tomb located behind a cafe.

Folklore and history carved into Brittany's coast.

This triumphal arch celebrating the Sun King's conquest of Lille is a masterpiece of military architecture.

The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

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

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

There is a strange little carving of a person seemingly crushed by a pillar behind the remains of St. Thomas Aquinas.

Perfume museum and library.

An Orthodox church built by the Royal Family for the Russian community exiled to the French Riviera.

French commune at the heart of conspiracies.

An ancient ossuary in Rouen.

Figures of unknown origin carved into the surfaces of underground caves.

With a history of slaughter, feast, and famine, remnants of the pork industry decorate this area--even its church.

The construction of a tram line unveiled hidden remnants of the old medieval city.

The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

A 400-year-old church covered floor to ceiling in ex-voto offerings from the faithful.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

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

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