Lago di Montedoglio
Pieve Santo Stefano, Italy
Lake Montedoglio is the artificial lake in the Province of Arezzo, Tuscany, Italy. At an elevation of 435 m, its surface area is over 800 hectares (2, 000 acres), making it the largest lake in Tuscany.
Reservoir data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).