Nubes | Info

The railway line has 29 bridges, 21 tunnels, 13 viaducts, 2 spirals and 2 zigzags . [5] [6] Because of the design decision not to use a rack-and-pinion for traction, the route had to be designed to avoid steep grades . [7] The zigzags allow the train to climb up driving back and forth parallel to the slope of the mountain.