It is a wonderful example of fluvial erosion on limestone, with giant potholes, typical rocky vegetation and different species. The road that runs along the stream is currently abandoned and therefore forbidden to the traffic. Thanks to the steepness of the slopes, the level of anthropization and disturbance of the area is quite low. The site is ornithologically relevant for the rocky walls that represent the suitable habitat for many species of birds of prey. In the area, Crayfish (Austropotamobius pallipes), Vertigo angustior, Helix pomatia and Marble trout (Salmo [trutta] marmoratus) have actually been reported. In the surroundings, there are Wildcat (Felis silvestris) and Horvath’s rock lizard (Iberolacerta horvathi). Zamenis longissimus, Hierophis viridiflavus and Podarcis muralis are common and in the waters of the river, Natrix tessellata is quite frequent. In the Vecchia Diga cave, Miniopterus schreibersii has been reported, along with several endemic species of the Orotrechus genus.