L'Etang de Thau is the largest lake of the region Languedoc-Roussillon. It is a water lagoon separated from the Gulf of Lion by Lido. It produces oysters and mussels. You can also navigate to the marina. It connects the Canal du Midi to the Canal du Rhone to Sete. Major cities that border are: Sete, Meze, Marseillan, Bouzigues Balaruc-les-Bains.