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211 places in the atlas, 24 of them inscribed as UNESCO World Heritage.
🇺🇸 United States · Earthwork
Early to Middle Woodland (1000 BCE–300 CE) · Adena – early Hopewell
Paired Adena (1000–100 BCE) and Hopewell-era enclosures on left bank of Scioto 5 mi north of Chillicothe: large 350-m-diameter circular enclosure (12 ac) with interior ditch and 1.5 m embankment plus…
🇺🇸 United States · Earthwork
Early Woodland, Adena culture 1000 BCE–1 CE (peak 250–150 BCE) · Adena
Largest conical burial mound in North America (62 ft/19 m high, 240 ft/73 m diameter, 60,000 tons earth moved by basket) built by Adena peoples at Moundsville, WV.
🇺🇸 United States · Earthwork
Early Woodland Adena 1000–200 BCE · Adena
Second-largest conical mound in Ohio (65 ft/20 m high, 877 ft circumference) and tallest surviving Adena mound, preserved at Miamisburg Mound State Park.
🇺🇸 United States · Earthwork
Middle Woodland Hopewell–Adena 250 BCE–200 CE · Hopewell tradition (Adena antecedent)
Hopewell circular enclosure and Great Mound, 250 BCE–200 CE.
🇺🇸 United States · Earthwork
Early Woodland Adena 1000–400 BCE · Adena
Large Adena conical mound (38 ft/11.5 m high, 140 ft/43 m diameter) preserved in Indian Mound Reserve, Enon. One of the best-preserved Adena mounds in Ohio, surrounded by former enclosures now plowed.
🇺🇸 United States · Earthwork
Early Woodland Adena · Adena
Adena conical mound (19.5 ft/6 m high, 95 ft/29 m diameter) preserved as Story Mound State Memorial, encircled by suburban Chillicothe but intact with original ditch.
🇺🇸 United States · Earthwork
Early Woodland Adena to Early Hopewell transition · Adena
Adena conical mound (20 ft/6 m high, 100 ft/30 m diameter) preserved in Campbell Park, Columbus — one of few surviving mounds in Ohio's capital city.
🇺🇸 United States · Earthwork
Disputed: either Adena 320 BCE–200 CE or Fort Ancient 1070–1200 CE (latest C14 favors Fort Ancient 1120 CE) · Adena culture or Fort Ancient culture
Quarter-mile (411 m) effigy mound in shape of serpent with oval head swallowing an egg, 3 ft high, coiled tail atop meteor-crater plateau above Ohio Brush Creek, largest surviving effigy mound in…
