The Great Lakes are the largest system of fresh surface water on earth,
containing roughly 18 percent of the world supply. The lakes contain enough
water to cover the entire surface of the continental United States to a depth
of 9 feet. The Great Lakes span more than 750 miles from west to east and their
shoreline is equal to almost 44 percent of the circumference of the earth.
Michigan's Great Lakes coastline alone is over 3,200 miles long, which is more
coastline than any state but Alaska.
To highlight some of the interesting coastal and
subsurface features of the Great Lakes, the
NOAA Great Lakes Environmental Research Laboratory
has assembled a narrated Google Earth tour.
Download Google Earth*
Launch Google Earth Great Lakes Tour (you will need to
download Google Earth in order to view tour). You can also watch the tour using
the Earth API below.