Lagoon of Cazaux et de Sanguinet

Lake Sanguinet lies behind the coastal dunes of the Landes. The Gourgue once flowed west to the Atlantic, but sand gradually blocked its outlet and water accumulated behind the dunes. The Gallo-Roman settlement of Losa stood beside the river before the lake rose over it. Its inhabitants abandoned Losa in the third century, and its temple was submerged by the sixth. The remains of the settlement and old wooden canoes lie beneath the lake.