The train to the clouds: an engineering marvel in Argentina's Andes

The "Train to the Clouds" in northern Argentina traverses dizzying viaducts and deep valleys over 4,000 meters high. This engineering marvel, once the world's highest railway, passes through cactus forests and the driest desert, connecting Salta to the Chilean coast. The documentary follows this route, highlighting its historical significance for transporting goods and its impact on indigenous communities and tourism.