Rocky Fork Park Site in southeastern Ohio is an archaeological site known for unusual prehistoric earthworks on a hill edge in eastern Highland County. Attributed to Hopewellian peoples, it features two concentric circular enclosures with level tops and eastern gateways that open across the hillside, creating an amphitheatre-like effect from within. Unlike many hilltop enclosures in Ohio, its placement is considered distinctive, and it is thought to have served ceremonial rather than defensive purposes. Because the land was cleared for pasture but never plowed, the earthworks remained well preserved. In 1973, the site was listed on the National Register of Historic Places for its archaeological significance.