A train of empty sulfuric acid tank cars is descending the steep grade from the Potrerillos mine. Sulfuric acid is a major ingredient for the making of copper.
This is one of the most spectacular railroads that I have ever seen. It climbs the Andes Precordillera up to 2850 meters / 9350 ft. It is a meter gauge line, similar to most other Chilean lines. I... (more)