Wikipedia
Palvico
The Palvico (it. Torrente Palvico) is an emissary of the lake Lago d'Ampola. Between Tiarno di Sopra and Storo the river flows inside a deep cut canyon through various basins with steps up to 20 m in between. The last bassin opens with a 50 m drop called Buco della Morte (en: Mouth of death) to the valley at Storo.
This potential has been used since 1905 for hydroelectric plants.