Claude Monet was baptized in this lavishly ornate Paris church.

Trek into the depths of the cave where 17,000-year-old paintings exist alongside 400-year-old graffiti.

This collection of French root art looks like an indoor fairy wonderland.

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

This lesser-known Frank Gehry building houses a treasure trove of cinema history.

This futuristic observatory at the top of the Pyrénées offers unrivaled views.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

One of the largest ochre quarries in the world, hidden in a limestone landscape.

The remains of 40,000 humans, meticulously stacked in a tiny churchyard shed.

A 2017 crowdfunding campaign saved this historic castle from being destroyed.

This ancient theater was once the home of fierce gladiatorial battles.

Order a boozy baba au rhum at the oldest patisserie in Paris.

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

The deserted pirate-themed restaurant still entices explorers.

A tiled, multi-level garden of survival in Lyon.

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

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

Ghosts of France's colonial past.

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

What looks like a normal building is really a hollow facade hiding a subway vent.

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

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

A medieval church with largest and oldest collection of Renaissance frescoes in France.

The sunken structure looks like the victim of a catastrophic flood.