This is Lake Superior. It's the largest lake in North America.
This is Isle Royale. It's the largest island in Lake Superior. Native Americans once mined it for copper. Benjamin Franklin, one of the American negotiators of the 1783 Treaty of Paris, knew this, so he pressed the British to let it fall within American territory.
There are many lakes on Isle Royale. This one, Siskiwit Lake, is the largest.
There are several islands in Siskiwit Lake. This one, Ryan Island, is the largest. So Ryan Island is the largest island in the largest lake in the largest island in the largest lake in North America.
You can see photos of Ryan Island here. It's about a quarter of a mile long.
(Satellite images via Google Maps)