The southern region consists of the ''Plaine du Cul-de-Sac'' (the southeast) and the mountainous southern peninsula (also known as the Tiburon Peninsula). The Plaine du Cul-de-Sac is a natural depression that harbors the country's saline lakes, such as Trou Caïman and Haiti's largest lake, Étang Saumatre. The Chaîne de la Selle mountain range – an extension of the southern mountain chain of the Dominican Republic (the Sierra de Baoruco) – extends from the Massif de la Selle in the east to the Massif de la Hotte in the west.