France, Somme (80), Baie de Somme, Saint-Valery-sur-Somme, Grande marée depuis les quais de Saint-Valery, un couple de cyclistes observe ce spectacle inhabituel // France, Somme (80), Somme Bay, Saint-Valery-sur-Somme, high tide from the quays of Saint-Valery, a couple of cyclists observe this unusual spectacle