The Great Lakes are estimated to have been formed at the end of the last ice age (about 10,000 years ago).
none of the great lakes are man made all of them were made from nature
No they are not.
The Great Lakes are a natural feature.
they made by glaciers melting
melted glaciers
The Great Lakes are a natural feature.
Michigan
How the Earth Was Made - 2009 Great Lakes 1-7 was released on: USA: 24 March 2009
The Great Wall of Texas, How lakes are made from peanut butter crackers
The Great Lakes
Nature, man made, etc.
Water. Some dirtier than others.