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

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.

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

A former milk-delivery driver and his wife turn their home into a glimmering mosaic.

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

Personal garden filled with mosaics made of recycled garbage.

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

Resting on a hill overlooking the coast, these medieval ruins look completely deserted save for their restored chapel.

Site of one of World War I's most horrific scenes.

Fighting the British and making game shows for over 150 years.

A massive, secret marina for the Nazis' most formidable weapon in the Atlantic.

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

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

100-windowed castle turned art gallery, built by one dedicated mason.

Artist and musician Will Menter creates musical sculptures.

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

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

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

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

Bloodstains can still be seen in this medieval church where two medics saved lives on D-Day.

Walk through living pictures and music in the Cathedral of Images.

French commune at the heart of conspiracies.

The opulent home that inspired Tintin's Marlinspike Hall and the adventures within.