Brookside Cemetery

Historical marker location:

5417 Hardin-Wapakoneta Rd, Sidney, Ohio

( Marker is on Hardin-Wapakoneta Rd (County Route 20), on the right when traveling south.)

Hardin Presbyterian Church Building. 1865 - 1925.

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.