The Poverty Point earthworks, located 1.1 miles north, date to 1700-1100 B.C. Native Americans who hunted, fished, and gathered wild foods built them. The 5 mounds, 6 ridges, and 43-acre plaza form a design unique in the world. A 6th mound was added 1800 years later. Tons of rock were imported from distant places for tools and ornaments.