During the 16-hour trip, the train travels 217 km and climbs a staggering 3,000 meters.
It crosses 29 bridges, 12 viaducts, 21 tunnels, swoops round two gigantic loops and two switchbacks.
He designed a singular system supported by bridges, tunnels, viaducts, spirals and zigzags.
Maury didnt use funiculars orcogwheelsthat are normally used on steep slopes, instead relying on switchbacks to gain height.
The route started taking tourists from the 1970s.
The train makes only two stops, almost at the end of the trip.
The second stop and the end of the route is the spectacular La Polvorilla viaduct.
The curved viaduct is 224 meters long and 70 meters high from the valley.
The train glides across the viaduct and stops before reversing back, poised for the return journey.
The trip back to Salta is completed in the dark and reaches Salta just before midnight.
