The oldest publicly-accessible evidence of ceremonial culture in North America -- and the largest earthwork in the world (I think) - and it's NOT a World Heritage Site? That simply does not make sense. Unlike most other earthwork sites, this one still sites in a landscape much like it did at it's peak, enabling visitors imaginations to form an idea of life for these moundbuilders. Not only is the main site still mostly intact, the outlying mounds are as well -- another rarity among earthworks. Group it with the even more ancient nearby Watson Brake, in university hands, and the mounds on the Frenchman's Bend Golf Course, and created is a prime example of the roots of humanity in North America.