Below the 2,260 m high Mt. Corno del Renon, the Rio Gander flows for a few km from the Renon until Colma, where it runs into the Isarco river. On its quite short way, it overcomes impressive 1,510 m in altitude. There, where rocks cross its path, it cascades in a total of three waterfalls. The lower waterfall is with 85 m the longest, the upper one at 1,214 m a.s.l. is 45 m long.

The Barbiano Waterfalls - "Barbianer Wasserfälle" in German, "Cascate di Barbiano" in Italian - are accessible within a nice easy hike, which starts in Barbiano in the Valle Isarco valley. The small village is famous for its leaning church tower which is said to be even more leaning as the one of Pisa. From there it takes about 30 minutes to reach the lower waterfall, always following the signposts "Zum Wasserfall" (to the waterfall). A narrower and steeper path proceeds then further to the upper waterfall (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.