Poitevin Marais marshlands
A huge triangle delineated by the Vendée, Charente-Maritime and Deux-Sèvres, the Marais Poitevin is divided into areas of wet marshland further inland and drier land here, closer to the sea. Protected by dykes and canals, its black Brie soil requires fertilising to grow wheat, barley, corn and beans. Its saltwater meadows serve as pasture for cows and sheep. The Aiguillon bay, slowly silting over, is home to mussel beds on pilings.