Cascate del Varone
The Cascate del Varone (Varone Waterfalls) are pair of waterfalls that fall into a vertical cave 3 kilometers north-west of the northern end of Lake Garda and the city of Riva del Garda in northern Italy. The name Varone has its origin from the town of Varone a short distance away.
Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).