🇺🇸 United States · Earthwork
Monks Mound
Mississippian 900–1200 CE (peak 1050–1200) · Mississippian (Cahokia)
Largest earthen structure in the Americas north of Mexico and centerpiece of Cahokia Mounds State Historic Site.
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484 places in the atlas, 33 of them inscribed as UNESCO World Heritage.
🇺🇸 United States · Earthwork
Mississippian 900–1200 CE (peak 1050–1200) · Mississippian (Cahokia)
Largest earthen structure in the Americas north of Mexico and centerpiece of Cahokia Mounds State Historic Site.
🇺🇸 United States · Earthwork
Neolithic to Mississippian (3000 BCE–1400 CE) · Neolithic / Woodland
Serpent Mound — Head Coil North Bend (Adams County) in Ohio, Adams County, Serpent Mound, United States is a Neolithic to Mississippian (3000 BCE–1400 CE) …
🇺🇸 United States · Ancient village
Pueblo II-III; Bonito outlier peak · Chacoan outlier (McElmo transitional)
South Road great house outlier (100 rooms, 1080–1100 CE) 35 km south of Chaco — tower kiva, 8 m wide Chaco road berm to canyon, defining regional system maximum.
🇺🇸 United States · Earthwork
Neolithic to Mississippian (3000 BCE–1400 CE) · Neolithic / Woodland
Poverty Point — Ridge 3 Terrace West (Jackson Parish) in Louisiana, West Carroll Parish, Poverty Point, United States is a Neolithic to Mississippian (3000…
🇺🇸 United States · Ancient city
Woodland Glades 450 BCE–1700 CE · Belle Glade (Calusa/Glades)
Glades woodland pond-mortuary and 1200 m causeway with charnel house, wood effigies in submerged pond.
🇺🇸 United States · Earthwork
Middle Woodland Hopewell 100 BCE–500 CE · Hopewell tradition
Hopewell 22 ha circle-square with 321 m Great Circle, UNESCO 2023 unit-of-measure type-site.
🇺🇸 United States · Ancient village
Hohokam Classic (1150–1450 CE) · Hohokam (Tucson / Marana community)
Classic Hohokam platform 1150 CE — ballcourt & 150 m terrace rock-pile fields (Fish).
🇺🇸 United States · Earthwork
Neolithic to Mississippian (3000 BCE–1400 CE) · Neolithic / Woodland; Hopewell
Seip Earthworks — North Circle Ancillary (Ross County) in Ohio, Ross County, Seip, United States is a Neolithic to Mississippian (3000 BCE–1400 CE) earthwo…
🇺🇸 United States · Earthwork
Neolithic to Mississippian (3000 BCE–1400 CE) · Neolithic / Woodland; Hopewell
High Bank Works — Octagon Northeast Corner in Ohio, Ross County, High Bank, United States is a Neolithic to Mississippian (3000 BCE–1400 CE) earthwork attr…
🇺🇸 United States · Ancient village
Fort Ancient 1000–1750 CE, Mississippian-influenced Late Prehistoric · Fort Ancient (Central Algonquian, Fort Ancient tradition)
Reconstructed Fort Ancient circular village (3 acres) on Great Miami River terrace at Dayton: central plaza 42 m diameter ringed by post-mold houses, stockade with bastions, and reconstructed cedar…
🇺🇸 United States · Archaeological wonder
Ancestral Pueblo Virgin branch Basketmaker III–Pueblo II · Ancestral Pueblo (Virgin Anasazi / Ancestral Pueblo)
100-room Virgin Anasazi pueblo complex partly drowned by Lake Mead, 300 BCE–1150 CE.
🇺🇸 United States · Rock art
Archaic to Protohistoric (7000 BP–1700 CE) · Paleoindian through Dakota
Midwest's largest petroglyph site: 4000 carvings 7000 BP–1700 CE on quartzite outcrop tracing 7000 years.
🇺🇸 United States · Earthwork
Hopewell 1–500 CE (Middle Woodland, peak 100–400 CE) · Hopewell tradition (Scioto Hopewell)
Finest Hopewell enclosure: 13-acre (5.3 ha) flat-topped earthen-walled enclosure (1,211 m perimeter, 1–1.8 m high) near Scioto River enclosing 24 conical, elongated and effigy mounds.
🇺🇸 United States · Earthwork
Middle Woodland 80–550 CE · Middle Woodland (Hopewell-related)
2.75 km stone-walled hilltop enclosure, solstice-aligned, 80–550 CE.
🇺🇸 United States · Earthwork
Paleo-Indian Dalton 8500–7900 BCE · Paleo-Indian Dalton (Sloan Dalton)
8,500 BCE Paleo-Indian cemetery, oldest in the Americas, 475 burials.
🇺🇸 United States · Rock-cut
Late Bronze Age (1550–1050 BCE) · Late Bronze Age
Ben Glen Rock-Cut Complex in Ohio, United States is a Late Bronze Age (1550–1050 BCE) rock_cut attributed to Late Bronze Age culture.
🇺🇸 United States · Earthwork
St Johns IIc–Mississippian 1050–1562 CE (midden 3000 BCE onward) · St Johns (Timucua ancestors)
St Johns platform mound 6.7 m with 300 m causeway and 6000-year midden, contacted 1562 by French.
🇺🇸 United States · Ancient city
Pueblo II–III (1050–1140 CE) · Ancestral Pueblo (Chacoan)
Cliff-point Great House 1050 CE — oval arc & solstice pictograph.
🇺🇸 United States · Ancient city
Pueblo II–III Chacoan (1080–1140 CE) · Ancestral Pueblo (Chacoan)
South Road Great House 1080 CE — 120 rooms, kiva & 9 m Chaco road.
🇺🇸 United States · Ancient village
Pueblo II-III; Chacoan · Chacoan Ancestral Pueblo → McElmo
Chaco south-side great house (72 rooms, 1100 CE) with tower kiva, enclosed plaza and South Road segment — Bonito to McElmo transition across canyon.
🇺🇸 United States · Submerged site
Yayoi (300 BCE–300 CE) · Yayoi
Sunken City off Burn Dhara in Ohio, United States is a Yayoi (300 BCE–300 CE) submerged city attributed to Yayoi culture.
🇺🇸 United States · Earthwork
Mississippian Fort Walton 1100–1550 CE · Fort Walton (Mississippian Pensacola variant)
Fort Walton culture temple mound on Choctawhatchee Bay, 1100–1550 CE.
🇺🇸 United States · Earthwork
Hopewell culture 100 BCE–500 CE · Hopewell (Adena descended, Algonquian? cohort)
Hopewell giant geometric enclosures marking 18.6-yr lunar cycle.
🇺🇸 United States · Earthwork
Middle Woodland Hopewell 50–350 CE · Hopewell tradition
Scioto bluff Hopewell enclosure triplet (circle-square-irregular) 45 km south of Chillicothe core.
