I don't know. But I do know that North America has a rich h…

I don't know. But I do know that North America has a rich history of ancient structures, and it's fascinating to explore these old findings. If you are curious, though, some of the oldest stone structures in North America could include the Poverty Point site in Louisiana, or early Inuit stone constructions in the Arctic, although "building" might be stretching it for what these structures are. Keep in mind, this doesn't necessarily represent the oldest in terms of North America's human history as some indigenous communities also built with stone. Do you want me to look up more about ancient stone structures in North America?