Quebrada del Toro

Quebrada del Toro is a gorge northwest of Salta, Argentina. It is along the famous narrow-gauge railway, Tren a las Nubes (Train to the Clouds) that runs between Salta and San Antonio de los Cobres, a small mining town at the top of the gorge. The gorge is surrounded by dense forest, imposing rock formations, and colorful varieties of cactus that make for some awe-inspiring scenery. The gorge is named after the nearby river, Rio Toro, which is a calm trickle most of the year. But in the spring its waters are often raging. 
The train's path, as well as the path that tour buses take, runs through the Valle de Lerma and climbs to higher elevations, eventually reaching Quebrada del Toro and San Antonio de los Cobres at an elevation of 12,300 feet. Along the way, visitors can see the ruins of a pre-Inca village called Santa Rosa de Tastil, as well as several bridges and viaducts. 

Practical Info

Quebrada del Toro and San Antonio de los Cobres are located approximately 100 miles northwest of Salta. It is best reached with a tour.