Kokkosaari

Kokkosaari is the largest island in a lake on an island in a lake in the world. It is located in Kuonanjärvi on the Sääminginsalo island, which has been claimed to be the largest island in Finland. Kokkosaari is almost 2000 m long, with a width of 400–900 m.^[1]

61°59.2′N 29°13′E / 61.9867°N 29.217°E / 61.9867; 29.217