was formed during the ice age . It is
filled with melt water , which appeared during the thawing of glaciers.
They are located in North America, in United States and Canada; Lake Michigan is located entirely in the United States, for the rest of the lakes is the border between the United States (⅔ waters ) and Canada (⅓ waters of lakes) . By the Great Lakes are the five biggest : Superior, Huron, Michigan , Erie and Ontario , sometimes they include and Lake St. Clair , they form the largest group of freshwater lakes on Earth
Visit all five " Great Lakes " for one or more days - it is impossible
Great Lakes