Lake Titicaca is a lake located on the border of Peru and Bolivia. It sits 3,811 m (12,500 ft) above sea level, making it the highest commercially navigable lake in the world. By volume of water, it is also the largest lake in South AmericaGrove, M. J., P. A. Baker, S. L. Cross, C. A. Rigsby and G (...) (from Wikipedia)