What a view! The blue-green waters of Lake Superior stretch out from the gray cliffs at Pictured Rocks National Lakeshore in Michigan. Lake Superior is the largest, coldest and most pristine of the Great Lakes. It has the largest surface of any freshwater lake on earth and it is the third largest lake by volume. Storms, snow, fog, humidity, temperatures and wind generated from the lake impact every park ecosystem, causing dramatic seasonal changes. Photo by Gregory Lloyd (http://ift.tt/18oFfjl).