1742: "The Milk Hill Spiral"

Interesting Things with JC #1742: "The Milk Hill Spiral" – In a wheat field on Milk Hill, 409 separate circles form a six-sided spiral across roughly 780 to 900 feet of rolling ground. The circle sizes change as the pattern spreads outward, but the larger geometry holds across the hillside. The formation is documented; who designed and built it is not.