Carnac is a commune beside the Gulf of Morbihan on the south coast of Brittany in the Morbihan department in north-western France. Its inha…Carnac is a commune beside the Gulf of Morbihan on the south coast of Brittany in the Morbihan department in north-western France. Its inhabitants are called Carnacois in French. Carnac is renowned for the Carnac stones – one of the most extensive Neolithic menhir collections in the world – as well as its beaches, which are popular with tourists.