Lake Leśnia is a small artificial lake, located on the Kwisa river, between towns of Leśna and Gryfow Slaski in Lower Silesian Voivodeship, southwestern Poland. It was opened on July 15, 1905, after a dam had been completed near the village of Czocha. The dam was constructed between 1901 - 1905, by the government of Kingdom of Prussia’s Province of Silesia. Most workers employed during construction came from Austria and Italy, and total cost was estimated at 1,270,00 reichsmarks. The dam is 45 m high, its length is 130 m, and its thickness - 8 m on top.