Lepper told me The Octagon and The Great Circle were once a larger, single Hopewell complex spanning 4.5 sq miles and connected by a series of roads lined by earthwork walls. Walking through both sites today, there is an immediate shock of scale. The Great Circle, where the museum for Hopewell Ceremonial Earthworks is found, is 1,200ft in diameter. Its walls rise up to 14ft high and are outlined on the inside by a deep ditch. The Great Circle was once connected to a square and a burial ellipse, with only part of the square still visible today. The Octagon sprawls a massive 50 acres and is attached to the 20-acre Observatory Circle, a large earthwork circle for gathering and rituals connected to the observation of the night sky.
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