The famous train of Salta, Argentina, called "El Tren de las Nubes" was chosen by the National Geographic publication as one of the best rail journeys in the world, along with 15 other trains.
The Train to the Clouds combines the landscapes of the Northwest with the Andean culture and the mystique of the stories on rails. The train -with 10 fully renovated wagons, which carry 500 passengers- leaves from General Belgrano Station in the city of Salta, going through the Valle de la Lerma and the Quebrada del Toro, to later arrive in the viaduct La Polvorilla, in the thresholds of the magnificent Puna.
The train is the fourth highest in the world, after those in China, Peru and Bolivia, reaching 4200 meters (13,780 ft) in its highest point, at the end of the railway line. Despite this fact, the Train to the Clouds’ typical characteristic is that it does not run using the rack system. This engineering feat, a work by the North-American engineer Richard Fontaine Maury (at the request of the then President Hipólito Yrigoyen), established the principle of wheel-to-road (not cogwheel) adherence to the railway lines, articulated in a spiraling and zigzag ascending logic.