🇺🇸 United States · Earthwork
Turner Earthworks
Middle Woodland (Hopewell) · Hopewell (Ohio Hopewell)
Hopewell earthworks (200 BCE–400 CE) on Little Miami — 300-m Great Enclosure and pipestone pipes at Cincinnati.
🇺🇸 United States · Ancient city
Blood Run Site
Late Prehistoric Oneota (Blood Run phase 1500–1700 CE) · Oneota (ancestors Dakota-Ioway)
Largest Oneota town 1500–1700: 76 mounds and boulder enclosure, 6,000 residents on Big Sioux.