Fort Buchanan

Historical marker location:

173 North High Street, Covington, Ohio

( Marker is on North High Street (Ohio Route 41/48) just south of West Broadway Street, on the right when traveling south.)

Marker installed: 2021

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.