On which lake lies Manitoulin - the largest island in a freshwater lake?
The island has an area of 2,766 km2 (1,068 sq mi), making it the 174th largest island in the world and Canada's 31st largest island. Manitoulin Island itself has 108 freshwater lakes, some of which have their own islands; in turn several of these "islands within islands" have their own ponds. Lake Manitou, at 104 km2 (40 sq mi), is the largest island in a freshwater lake in the world, and Treasure Island in Lake Mindemoya is the largest island in a lake on an island in a lake in the world.