 Park units include Mackinac Island State Park including Fort Mackinac and certain properties within the historic downtown of Mackinac Island, Michigan; Colonial Michilimackinac including Fort Michilimackinac and Old Mackinac Point Lighthouse; and Historic Mill Creek Discovery Park.It is assigned to the Michigan Department of Natural Resources.The Fisheries Division works to preserve and enhance Michigan's fish populations, as well as other forms of aquatic life.