Six concentric C-shaped earthen ridges around a 37.5 acre plaza in northeastern Louisiana, thrown up between 1700 and 1100 BC. Mound A is 72 feet tall on a base roughly 705 by 660 feet and is the second largest earthen mound by volume in eastern North America. The part that resets your assumptions: the people who built it were hunter-fisher-gatherers, not farmers. Monumental construction on this scale was supposed to require agriculture and a surplus, and here it plainly did not. Their descendants and the connection to modern tribes have not been established. UNESCO World Heritage on 22 June 2014, the first in Louisiana and the twenty-second in the United States. Near Epps, West Carroll Parish; state historic site with a museum and trails.
West Carroll Parish, Louisiana
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