Bretagne is known for its ancient rock formations, known as menhirs and dolmens. Gavres has its own dolmen, located just off the beach wall. It's poorly maintained, but there just the same. Wikipedia says:


A dolmen (also known as cromlech, anta, Hünengrab, Hunebed, quoit, and portal dolmen) is a type of single-chamber megalithic tomb, usually consisting of three or more upright stones (megaliths) supporting a large flat horizontal capstone (table). Most date from the early Neolithic period (4000 BC to 3000 BC). Dolmens were usually covered with earth or smaller stones to form a barrow, though in many cases that covering has weathered away, leaving only the stone 'skeleton' of the burial mound intact.

Dolmen originates from the expression taol maen, which means "stone table" in Breton, and was first used archaeologically by Théophile Corret de la Tour d'Auvergne.