Located in the widest area of the Andes Mountains in South America between the 14th and 27th degree of south latitude, it extends over four countries, Argentina, Bolivia, Peru and Chile. Most of the Altiplano is in Bolivia.
The average altitude is 3,300 meters, slightly lower than in Tibet. The Altiplano is surrounded by the mountain ridges of active volcanoes to the west, and the Atacama Desert, the driest area in the world, to the southwest. (wikipedia)