- There is enough water in Lake Superior to submerge all of North and South America in 1 foot of water
- It’s estimated there are about 100 million lake trout in Lake Superior – nearly one-fifth of the human population of North America
- Water in Lake Erie replaces itself in only 2.6 years, while the water in Lake Superior takes two centuries
- The shoreline of all the Great Lakes combined equals nearly 44% of the circumference of the earth
- Separated by the Straits of Mackinac, Lake Michigan and Lake Huron have the same mean water level and hydrologically speaking are considered one lake
- Part of Goderich Mine, the largest salt mine in the world, runs 500 meters under Lake Huron
