World's Most Dangerous Railway Lines

In northern Argentina, the world-famous Tren a las Nubes - the cloud train - crosses dizzying viaducts and deep valleys. At an altitude of over 4000 meters, what was once the highest railway runs past cactus forests and into the driest desert in the world. A technical feat in the Andes and a breathtaking ride through spectacular scenery.In northern Argentina, the world-famous Tren a las Nubes - the cloud train - crosses dizzying viaducts and deep valleys. At an altitude of over 4000 meters, what was once the highest railway runs past cactus forests and into the driest desert in the world. A technical feat in the Andes and a breathtaking ride through spectacular scenery.