Circuit des Alignements

On the west side of Carnac is the starting point of the Circuit des Alignements, which takes in the stone- settings and other megalithic monuments of Carnac, Ménec, Kermario and Kerlescan. These consist of menhirs (standing stones, which may be up to 6 m/20ft high), either free-standing, in rows (alignements) or in circles (cromlechs), dolmens (from a Celtic word for "stone table"), which were originally tombs, and tumuli containing tomb chambers - evidence of a prehistoric culture of which almost nothing is known.

It is estimated that the oldest stones date from the Neolithic (about 3500 B.C.). The function of the stones has been the subject of much speculation. One suggestion is that they may have served some calendrical purpose, but there is no agreement among experts on when and why they were erected.