The Laghetto di Ponte Subiolo (called also the White Elefant) is located in the common of Valstagna. It is one of the largest caves frequented by divers and by cave divers for its vast size and its great beauty. It stretches for 365 m, the difference in levels is 149 m. The cave opens in the Main Dolomite and begins with a 20 meters wide and 35 metres long outside pond. During heavy rainfall the water overflows creating a short stream, which after about 100 meters flows into Brenta.