The Great Lakes are a gift from prehistoric glacier movement, and treasures have been left behind along the shores of Lake Huron and the many inland lakes and rivers. Hunt for fossils dating back 400 million years to the Devonian Period. Rocky edges along the shorelines, Rockport State Park Recreation Area, and the Lafarge Fossil Park at Besser Museum are perfect locations for an afternoon of prehistoric adventure. Follow it up with a trip to Dinosaur Gardens to see life-size prehistoric recreations.