Sanilac Petroglyphs Historic State Park 
8251 Germania Road
Cass City, MI 48726
989-856-4411
http://www.michigandnr.com/ParksandTrails/Details.aspx?id=490&type=SPRK
State Park: Birding, Hike, History, Picnic, Walk
Rock carvings, known as petroglyphs, etched into a sandstone outcrop are a mystery. Yet they give us a glimpse into the lives of early Native American artists.