Great Mound, Ancient earthwork in Adams County, Ohio, United States.
The Great Mound extends 1,348 feet in length and rises three feet high, following the shape of a serpent with a coiled tail on a plateau.
Archaeological studies indicate the mound was constructed around 300 BCE by the Adena people, with later modifications by the Fort Ancient culture around 1400 CE.
The earthwork demonstrates the engineering capabilities of prehistoric Native American societies through its precise astronomical alignments with solstice and equinox points.
Visitors can access the site from Wednesday through Sunday, with an observation tower providing an elevated view of the entire serpentine structure.
The structure sits atop a meteorite impact crater, combining geological and archaeological significance in a single location.
Location: Ohio
GPS coordinates: 39.51550,-84.47625
Latest update: March 11, 2025 17:12
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