Lake Musters and Lake Colhué Huapí

Lake Musters and Lake Colhué Huapí (45°25′S 69°11′W, at altitudes of around 260 metres (850 ft)) form the terminal stage of the Senguerr River endorheic basin, located in the patagonic central region of Argentina in the south of Chubut province. Closest populated area is Sarmiento, an 8,000 inhabitant former Welsh immigrant colony. The lakes gave their names to the Mustersan and Colhuehuapian South American land mammal ages.