Historical Marker
Greendale
Historical marker location:
254 Greendale Ave, Cincinnati, Ohio
( Marker is on Greendale Avenue, 0.1 miles east of Clifton Avenue, on the left when traveling east.)
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.