![Michigan’s Native American Petroglyphs Are Believed to Be 300 to 1000 years old](http://townsquare.media/site/689/files/2022/09/attachment-Untitled-design-2022-09-22T125238.286.jpg?w=980&q=75)
Michigan’s Native American Petroglyphs Are Believed to Be 300 to 1000 years old
Michigan’s largest known collection of early Native American teachings carved in stone, believed to be 300-1000 years old, are located in Sanilac Petroglyphs Historic State Park near Cass City.