 Contemporary archaeogeodesy and archaeoastronomy researchers have demonstrated that the Hopewell and other prehistoric cultures had advanced scientific understandings which they used to create their earthworks for astronomical observations, markings and celebrations.Researchers analyzed the placements, alignments, dimensions, and site-to-site interrelationships of the Hopewell earthworks to understand what had been done.Today, the Ohio Historical Society preserves the Great Circle Earthworks in a public park near downtown Newark, called Mound Builders Park (or the Newark Earthworks) located at 99 Cooper Ave, Newark, Ohio.