This spectacular canyon of Serrai of Sottoguda, today "Natural Park", it extends it for about two kilometers between Sottoguda, the last village of this valley and Malga Ciapela on the foot of Marmolada.
The route is overhangs from rock wall more 100 m. high and in some point they restrict them till about touch them. The street crosses the Pettorina river for 13 times, infact there are so many little bridges, that people can find along this route. It is include also the brige in locality "La Vérda", where the canyon begins.