This tour offers vast landscapes of dry marshes, lands dammed and reclaimed from the sea. The marsh unfolds here its uniform and bare horizon, with a grid landscape of cereal crops. You will reach the seaside from where you will be able to see the island of Ré on a clear day. The rest of the route will take you to discover l'Aiguillon-sur-mer, its port and its oyster farming parks. If you walk along the beach at low tide, you will notice the "bouchots", oak stakes, supports for breeding the bouchot mussel.