Great Serpent Mound | |
 The Great Serpent Mound – ancient Native American effigy in Adams County, Ohio | |
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| Nearest city | Peebles, Ohio |
|---|---|
| Coordinates | 39°01′35″N 83°25′51″W / 39.02639°N 83.43083°W[2] |
| NRHP reference No. | 66000602[1] |
| Added to NRHP | October 15, 1966 |
The Great Serpent Mound is a 1,348-feet-long (411 m), three-feet-high prehistoric effigy mound located in Peebles, Ohio. It was built on what is known as the Serpent Mound crater plateau, running along the Ohio Brush Creek in Adams County, Ohio. The mound is the largest serpent effigy known in the world.
The first published surveys of the mound were by Ephraim G. Squier and Edwin Hamilton Davis, featured in their historic volume, Ancient Monuments of the Mississippi Valley (1848), that was commissioned by the Smithsonian Institution.
The United States Department of Interior designated the mound as a National Historic Landmark in 1966. The mound is maintained through the Ohio History Connection, a nonprofit organization dedicated to preserving historical sites throughout Ohio.