The main rivers of the region are the Garonne, that flows through the Gironde and Lot-et-Garonne departments; the Dordogne, that flows through the Dordogne and Gironde departments; the Lot, that flows through the Lot-et-Garonne department; the Dropt, that flows through the Dordogne, Gironde and Lot-et-Garonne departments; and the Adour, that flows through the Landes department.