Bowen-Thompson Quadrangle

Historical marker location:

Bowling Green, Ohio

( Marker can be reached from Thurstin Street (County Road 174) just north of East Court Street, on the right when traveling north.)

Marker installed: 2019

The Great Serpent Mound, located in Adams County, Ohio, is a prehistoric effigy mound in the shape of a serpent that is more than 1,300 feet long. It is one of the largest effigy mounds in the world and is estimated to have been built by the Adena culture more than 1,000 years ago.