The Carnac stones are an exceptionally dense collection of megalithic sites around the French village of Carnac, in Brittany, consisting of alignments, dolmens, tumuli and single menhirs. The more than 3,000 prehistoric standing stones were hewn from local rock and erected by the pre-Celtic people of Brittany, and are the largest such collection in the world. The stones were erected at some stage during the Neolithic period, probably around 3300 BC, but some may date to as old as 4500 BC.

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