Le Grau-du-Roi is a commune in the Gard department in southern France. It is the only commune in Gard to have a frontage on the Mediterranean. To the west is the Herault department and La Grande-Motte village, and to the east is the Bouches-du-Rhone department. Using the sea as a vantage point, the commune has four distinct sections: the right beach, the Village, the left beach, Port-Camargue and L'Espiguette. Immediately landwards are the large shallow étangs, saline marshes, which separate it from Aigues Mortes, a neighboring mediaeval walled city that used to be a port. The étangs are home to numerous flamingoes.

Aigues-Mortes is a commune in the Gard department in the Occitania region of southern France. The medieval city walls surrounding the city are well preserved. Situated on the junction of the Canal du Rhône à Sète and the Chenal Maritime to Le Grau-du-Roi, the town is a transit center for canal craft and Dutch barges.