A unique underground structure dating back to the 1st century BC.

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

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

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

The Argonaute submarine was the French navy's pride and joy in the 1950's.

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

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

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

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

These quaint French houses dangle precariously over a precipice.

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

An aluminum skeleton brings Chinese mythology to the French shore.

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

A Gothic cathedral created from volcanic rocks.

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

An icy lake tucked among jaw-dropping alpine panoramas.

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

A series of abstract, silly sculptures represent the works of a great modern classical composer.

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

19th century pendulum and a clock restored by a rogue group of guerilla artists.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

This charming wooden church was disassembled and moved not once but twice before settling in this Prague garden.