Parco Naturale Regionale delle Dolomiti d'Ampezzo

The streams Felizon and Travenanzes, and the rio Ra Vales have dug very deep ravines in the dolomite rock at the bottom of the valley, which has therefore a rough and wild aspect. The respective canyons can be crossed only through some bridges dating back to the times of the first communication systems linking the Ampezzo valley, the Pusteria and Marebbe valleys: they are the bridge Felizon on the road di Alemagna, the bridge Outo, and the bridge of the Cadorìs on the rio Travenanzes.
Despite having carried out a deep erosion, the streams Boite and Fanes are less narrow and deep and form characteristic small waterfalls which are evident on the Boite under the plain of Malga Ra Stua.