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

This tiny hotel perched atop a 50-foot tower really puts things into perspective.

A small house sits between two huge rocks, with its back to the sea.

1920's reinforced concrete church by architect Auguste Perret changes the face of modern design.

French Time Capsule-19th Century home revealed to the public.

Abandoned blockhouses from Nazi Germany's Atlantic Wall erode into the sea on a French beach.

An unusual sand beach in the middle of a forest.

This building’s ghostly exterior reflects its former lives as a prison, school, and funeral home.

A castle-like sea fort from the 17th century is now a museum to oyster farming.

The haunting concrete remains of a Nazi pebble crusher can still be found in this small French commune.

What if all public housing projects had been designed by "the Pygmalion of modern architecture," not only their prototype?

This emotive sculpture was originally created for the 1878 World's Fair.

This crack in France's seaside cliffs once hid a sinister secret.

For a brief time in 1960s France, families could climb into a tiny submarine and be pulled along an underwater journey.

These colorful French islands spent a stint bootlegging booze during American Prohibition.

A small town hallucinates en masse - Bad bread, or CIA science project?

This hidden garden boasts amazing views of Lyon.

On this romantic tidal island reachable only at low tide the tomb of a famous French writer overlooks the sea.

A tiny, forgotten park of surrealist sculptures in Angouleme.

A beautiful lighthouse with as many steps as days in the year, as many windows as weeks, and as many levels as months.

This mural painted by Keith Haring was done without payment as a gift to entertain the children at the Hôpital Necker.

Admire endangered plants in a verdant garden that looks straight out of a Monet painting.

The man who introduced reinforced concrete to the world demonstrated its genius by using it to build his own house.

Once the hottest nightclub in France, Amnesia now lies in ruins after a 2000 bombing.