Saint Briac sur Mer, an ancient fishermen's village that later became a seaside resort, consists of a ria (the downstream section of a steep-sided valley flooded by the sea) at the mouth of the River Frémur, a major point on the route followed by migratory birds in winter. In 1987, the Conseil Général (the equivalent of a country council) took action to save the sand dunes at Port Hue and Le Perron which had suffered serious damage. Marram grass was planted and fencing installed along the...