Canada is home to the world's largest freshwater island: Manitoulin Island in Lake Huron, Ontario.
Covering about 2,766 square kilometres, Manitoulin is separated from Ontario's mainland by the North Channel and from Michigan's Upper Peninsula by Lake Huron. Its name comes from the Anishinaabe word Manidoowaaling, commonly associated with the spirit world.
Manitoulin is unusual because the island itself contains 108 freshwater lakes. The largest is Lake Manitou, which covers about 104 square kilometres. That lake even contains Treasure Island, creating a famous geographic sequence: an island in a lake on an island in a lake.
The island has been home to Anishinaabe communities for centuries, and archaeological evidence at Sheguiandah shows human activity dating back as far as roughly 10,000 BC. A common mix-up is confusing Manitoulin with Greenland or other very large islands; the quiz category is specifically freshwater islands, not all islands worldwide.