- Lake, a lake on the boundary between S Peru and W Bolivia, in the Andes: the largest lake in the region; the highest large lake in the world. 3200 sq. mi. (8290 sq. km); 12,508 feet (3812 meters) above sea level.
- Lake Titicaca a lake between S Peru and W Bolivia, in the Andes: the highest large lake in the world; drained by the Desaguadero River flowing into Lake Poopó. Area: 8135 sq km (3141 sq miles). Altitude: 3809 m (12 497 ft). Depth: 370 m (1214 ft)