The Bassin de Thau stretches from Mont Saint Clair, near the town of Sète, to the Cap d'Agde (the hill visible at the horizon). Between these two extremities, a narrow sand bar offers 20 km of sparkling beaches. The rest of it is occupied by a road, a railroad track, vineyards, saltworks and several tourist facilities (campsites, hotels, restaurants, supermarkets etc.).