Poverty Point: The 3,000-Year-Old Earthworks in West Carroll Parish That Made UNESCO's World Heritage List

In the far northeast corner of Louisiana, off Highway 577 in West Carroll Parish, a set of grassy ridges and mounds sits on the edge of Macon Ridge, overlooking Bayou Macon. From a pickup truck on the highway it can look like pasture. It is one of the most important archaeological sites in North America, and since 2014 it has shared a list with the pyramids of Giza and the Great Wall of China as a UNESCO World Heritage Site.

The site is Poverty Point, named for a 19th-century plantation nearby. UNESCO's description dates its main construction to between 3,700 and 3,100 years ago, in what archaeologists call the Late Archaic period. Louisiana State Parks puts it between 1700 and 1100 B.C., and notes the timing in a way that sticks: eight centuries after the Great Pyramids were built and before the great Maya pyramids rose.

What makes Poverty Point remarkable is who built it. The people who moved this much earth were hunters, fishers and gatherers, not farmers, and Louisiana State Parks calls the work particularly impressive for a society that did not grow its food. UNESCO concluded that the complex was not surpassed in North America for at least 2,000 years, and only then by people supported by farming.

The layout is still easy to read on the ground. Six concentric ridges form a giant C, or half-ellipse, separated by shallow swales and divided by aisles, around a large central plaza. Parts of the ridges once stood as high as five feet, and the outermost ridge measures nearly three-quarters of a mile across. Archaeologists think the ridges served as foundations for dwellings, though little evidence of the houses themselves has been found. Five mounds complete the complex.

The largest is Mound A, sometimes called the Bird Mound. According to the Louisiana Division of Archaeology, it stands 72 feet tall, 710 feet long and 660 feet wide, and building it would have taken as many as 15.5 million basket loads of earth. It was raised around 1300 B.C., making it one of the last mounds built in the Late Archaic period. Unlike the other mounds, which grew stage by stage, Mound A was built in three sections: a cone, a platform and a ramp connecting them. Its builders finished the first two, took a long break, then added the ramp. When it was done, it lined up north to south with two of the other mounds.

The state estimates the full project may have required moving as many as 53 million cubic feet of soil, carried in baskets that held about 50 pounds at a time. The National Park Service puts the labor at five million hours.

Just as striking is what the people of Poverty Point brought in from far away. The ground here has no natural stone, so tools and other goods came through a trade network that reached hundreds of miles. Projectile points and stone tools found at the site were made from rock that originated in the Ouachita and Ozark mountains and the Ohio and Tennessee river valleys. Soapstone for cooking vessels came from the Appalachian foothills of northern Alabama and Georgia. Many of those artifacts are now on display in the site's museum.

Poverty Point's recognition has built over decades. It was named a National Historic Landmark in 1962, and the State of Louisiana has owned and run it as a public historic site since 1972. Congress later made it a national monument, managed by the state. It became a Smithsonian Affiliate in 2010 before the World Heritage listing four years later. The state has worked to keep the setting intact, and UNESCO noted in its listing that the quiet farmland around the site helps visitors understand it.

Visiting is easy and inexpensive. The Poverty Point World Heritage Site at 6859 Highway 577 in Pioneer is open daily from 9 a.m. to 5 p.m., closed only on Thanksgiving, Christmas and New Year's Day. Admission is $6 for ages 7 to 61, $4 for seniors 62 and older, and free for children 6 and under. Guided tram tours run Wednesday through Sunday at 10 a.m., 11:30 a.m., 1 p.m. and 3 p.m., weather permitting, and cost $10, or $8 for seniors. A 2.6-mile hiking trail loops through the grounds, and the site is listed in A Birder's Guide to Louisiana for visitors who bring binoculars. The state asks groups to call ahead at 318-926-5492 and suggests anyone checking on a specific program do the same.

Fall, once the summer heat breaks, is a comfortable time to walk the ridges. Standing at the foot of Mound A, it takes some imagination to picture the lines of people with baskets of dirt who raised it more than 3,000 years ago. The museum's exhibits on the trade network fill in much of what the mounds alone cannot.

Photo: Jennifer R. Trotter / Wikimedia Commons, CC BY-SA 4.0.