The Carnac stones are fenced off, so I was excited to find, driving through Erdeven (nearby) more menhirs – columns you can wander in and around. They date back to the Neolithic period (c.4,500 BC to 3,300 BC?).  Dolmens are tombs, tumuli a sort of burial ground and menhirs stones which may have military, astrological, religious, civic – or other significance.