BBC – Rediscovering America
Autumn leaves crackled under our shoes as dozens of eager tourists and I followed a guide along a grassy mound. We stopped when we reached the opening of a turf-topped circle, which was formed by another wall of mounded earth. We were at The Octagon, part of the Hopewell Ceremonial Earthworks, a large network of hand-constructed hills spread throughout central and southern Ohio that were built as many as 2,000 years ago. Indigenous people would come to The Octagon from hundreds of miles away, gathering regularly for shared rituals and worship.