Settled in 1840 at the head of Thunder Bay, Alpena served the booming lumber enterprises in the late 19th century. It is a center for industry and recreational boating, diving, fishing, snowmobiling, cross-country skiing and hunting; diving and fishing charters are popular on Lake Huron. The area also is home to a number of lighthouses. Thunder Bay National Marine Sanctuary lies in northwest Lake Huron; it was the first NOAA (National Oceanic and Atmospheric Administration) sanctuary to be designated in the Great Lakes. These 448 square miles contain more than 100 shipwrecks, and there are opportunities for boating, diving, kayaking and snorkeling. The Great Lakes Maritime Heritage Center interprets the underwater sanctuary. Learn More...