The site is aligned with the 18.6-year lunar standstill cycle, requiring precise astronomical knowledge to construct.
The Great Circle Earthworks feature a ditch located inside the wall, indicating it was likely a ceremonial boundary rather than a defensive fortification.
The Octagon Earthworks span 50 acres, with walls that remain up to 5 to 6 feet tall in some sections.
The earthworks were constructed using only hand tools, such as woven baskets, to transport millions of cubic feet of earth.
The site was designated a National Historic Landmark in 1964 and a UNESCO World Heritage site in 2023 as part of the Hopewell Ceremonial Earthworks.
The enclosures cover a massive total area that spans several miles across the Newark and Heath landscape.
Analysis of the site suggests it served as a pilgrimage destination for diverse groups across the eastern woodlands.
The Newark Earthworks represent the largest set of geometric earthen enclosures ever built by the Hopewell culture between 100 BCE and 500 CE. Designated as a UNESCO World Heritage site in 2023, the complex includes the Great Circle Earthworks, the Octagon Earthworks, and the Wright Earthworks. The site functioned as a sophisticated lunar observatory, with walls aligned to the 18.6-year cycle of the moon's northernmost and southernmost rise and set points. The Octagon Earthworks remain part of an active golf course, creating a unique historical land-use intersection. Visitors can access the Great Circle Earthworks in Heath, while the Octagon Earthworks require advanced coordination due to the lease agreement with the Moundbuilders Country Club. The landscape features massive walls once standing significantly higher than their current eroded remnants. These earthworks serve as one of the most significant archaeological sites in North America. The site is managed by the Ohio History Connection in partnership with local entities.
The elevated viewing platform at the Great Circle Earthworks for a panoramic perspective of the enclosure.
Check the Ohio History Connection website for specific viewing access dates for the Octagon Earthworks, as they differ from the Great Circle.
Wear sturdy walking shoes to traverse the grassy terrain of the Great Circle enclosure.
Bring binoculars for better views of the distant geometric walls across the golf course area.
Do not assume the Octagon Earthworks are fully accessible at any time without checking the specific restricted schedule first.
The Octagon Earthworks have highly limited public access due to their location on private golf course property; check current status before visiting.
Do not climb on the earthen walls; remain on marked pathways to prevent erosion and show respect for the site's status as a sacred space.
