The fascinating Serpent Mound Historical Site is situated in Adams County, surrounded by rolling hills and farmlands, and is one of the world’s most spectacular effigy mounds (mounds built in the shape of animals).

The mound is approximately 1,300 feet in length and about 3 feet high and represents a coiled snake that appears to be about to swallow an egg.

Although there are many theories, no one knows for certain why ancient cultures built the mound, but it is believed to have been used for ceremonial purposes.

The sophistication of the mound has led archaeologists to believe that it was built by an advanced culture that had knowledge of astronomy, possibly as far back as 300 BC. Map

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