Quebrada Del Toro (Bull’s Ravine) and viaduct of El tren de las nubes (the Train of the Clouds)
It's called that way because clouds can be often seen around and under the bridges and slopes
of the landscape through which the railway passes..
It is one of the highest train of the world, ascends to 4.200 metres high.
The railway line has 29 bridges, 21 tunnels, 13 viaducts, 2 spirals and 2 zigzags.