Panoramic of the Etang de Thau from a pontoon in Marseillan in summer, in Hérault, in Occitania, France

The Thau pond is the largest body of water in the Occitanie region. It has an area of approximately 7,500 hectares and an average depth of five meters (the deepest point being the source of the Vise, also called the Bisse hole, which reaches a depth of 32 m).