Mysteries of the Great Lakes April 24, 2010

The Great Lakes are among the Earth's largest and most beautiful bodies of fresh water. Carved by glaciers into dramatic rocky shores now dotted with early Native American pictographs, and reaching vast depths strewn with thousands of shipwrecks, the Great Lakes even affect the weather for a huge area of the continent. Mysteries of the Great Lakes takes viewers on an "in-depth" exploration of over 10,000 miles of spectacular coastlines, learning amazing facts about the massive lakes. Along the way they'll come to understand why these five distinctive bodies of water, used for consumption, commerce, recreation and wildlife conservation, are a treasure that must be protected.