Trakošćan Lake
Bednja, Croatia · built 1862
Lake Trakošćan (Croatian: Trakošćansko jezero) is an artificial lake located in Trakošćan, Hrvatsko Zagorje, Croatia. The lake measures about 1.5 kilometres (1 mi) in length, and around 17 hectares (42 acres) in area. Its average depth is 2.5 metres (8 ft). The water reaches temperatures up to 28 °C (82 °F) in summer. The lake freezes over for three months during the winter. At its inception, the lake functioned as a fish pond, but retained its architectural importance to the present day.
Reservoir data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).