This marvelous tour permits us, leaving from Salta , to visit part of the mountain range until we arrive at the chilean border. The railroad line is one of the most important works of railroad engineering in the world, that must make many turns, with sharp curves and "curls" passing through tunnels. Ascending about 1200 meters at sea level at more than 4100 meters. On our climb we will visit indigent peoples until we end our journey in San Antonio de los Cobres and the Viaduct of La Polvorilla. During the journey we will have the pertinent explanations and we can lunch in the dining car (duration: 14 hours).