This historic effigy located just north of Peebles is the largest serpent effigy in the United States. The on-site burial mounds have been identified as belonging to two cultures: the Adena, who lived from 800 BC to 100 AD; and Fort Ancient, who lived from 1000 to 1550 AD. Address: 3850 State Route 73 Peebles MI USA 045660 1 937 587-2796