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Sanilac Petroglyphs Historic State Park protects and interprets Michigan's largest known collection of early Native American teachings carved in stone.

The spiral motif is found numerous times carved into the sandstone rock.

This cluster of different carvings shows a human figure in the center, a representation of a bird on the left, handprints, and birds in flight.

The North fork of the Cass River flows through the property of the Sanilac Petroglyphs State Historic Park. Interpretive signs are included on a trail that follows the river.