Below Mt. Corno del Renon, the Rio Gander flows for a few km from the Renon High Plateau until Colma, where it runs into the Isarco River. On its quite short way, it overcomes impressive 1,510 metres in altitude. There, where rocks cross its path, it cascades in a total of three waterfalls. The lower waterfall is with 85 metres the longest, the upper one at 1,214 metres a.s.l. is 45 metres long.

The Barbiano Waterfalls (Barbianer Wasserfälle) are accessible within a hike, which starts in Barbiano. The small village is famous for its church tower which is said to be even more leaning as the one of Pisa. From there you reach the lower waterfall by following the signposts "Zum Wasserfall". A narrower and steeper path proceeds to the upper waterfall in approx. 40 minutes.

Impressive are the dark quartz porphyry rocks, a 300 million year old volcanic rock, as well as the snow melting in April and May, when gigantic mass of water cascade down the slopes of Barbiano. By the way: In the surroundings the spring sanctuary of Tre Chiese (Three Churches) is located.