🇺🇸 United States · Earthwork
Rock Eagle Effigy Mound
Archaic–Woodland 1000 BCE–1000 CE · Woodland / Archaic
36.5-m quartz eagle effigy, 1000–500 BCE.
🇺🇸 United States · Ancient village
Peñasco Blanco (Penasco Blanco)
Pueblo I-II-III; Chuskum-Chacoan · Chacoan × Chuskan frontier (Chuska timber route)
Mesa-top wedge great house on West Mesa promontory (900–1125 CE) controlling west gap and Chuska roads — crescent plan with great kiva and hinterland pictograph.
🇺🇸 United States · Ancient city
Caddo Mounds State Historic Site
Caddoan Mississippian 800–1300 CE (Early Caddo) · Caddoan (Hasinai)
Southernmost Caddoan Mississippian center with three mounds, plaza and El Camino trace.
🇺🇸 United States · Tell
Kin Biniola Chaco Outlier
Ancestral Puebloan (c.600-1300 CE) · Anasazi/Puebloan (Basketmaker to Pueblo III)
Kin Biniola Chaco Outlier — buried ancestral tell/village at New Mexico.
🇺🇸 United States · Rock art
Pipestone National Monument Quarries
Archaic to present (1000 BCE–present) · Sioux (Dakota/Lakota/Nakota), Oneota predecessors
2,000-year sacred catlinite quarries: 3000 pits in Sioux quartzite cliff plus thunderbird petroglyphs.
🇺🇸 United States · Ancient city
Ancient City of Ness-Rath
Late Bronze Age (1550–1050 BCE) · Late Bronze Age
Ancient City of Ness-Rath in Ohio, United States is a Late Bronze Age (1550–1050 BCE) ancient city attributed to Late Bronze Age culture.
🇺🇸 United States · Earthwork
Lake Jackson Mounds Archaeological State Park
Fort Walton Mississippian 1050–1500 CE · Fort Walton (Apalachee) Mississippian
Mississippian chiefdom capital on Lake Jackson with 11 m platform mound and famed repoussé copper plates.
🇺🇸 United States · Earthwork
Rock Hawk Effigy Mound
Woodland–Archaic 1000 BCE–1000 CE · Woodland peoples
30-m quartz hawk effigy on Oconee River, paired with Rock Eagle.
🇺🇸 United States · Earthwork
Jaketown Site
Late Archaic–Poverty Point ca. 1700–1500 BCE · Poverty Point culture (Jaketown phase)
8-mound Poverty Point–related center, 1700–1500 BCE.
🇺🇸 United States · Ancient village
Wijiji (Chaco Canyon)
Pueblo III; late McElmo revival · Mesa Verde McElmo → Chaco East Wash
Late McElmo eastern great house (30 rooms, 1105–1115 CE) at Chaco Wash narrows — single-wing McElmo revival after main canyon collapse, with check dams.
🇺🇸 United States · Earthwork
Letchworth-Love Mounds Archaeological State Park
Woodland Weeden Island 200–800 CE · Weeden Island (Swift Creek)
14 m platform mound, largest Woodland mound in Florida, 200–800 CE.
🇺🇸 United States · Earthwork
Miamisburg Mound
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
Kolomoki Mounds Historic Park
Swift Creek–Weeden Island 350–750 CE · Swift Creek – Weeden Island
Woodland Mound A 17 m, Swift Creek 350–750 CE.
🇺🇸 United States · Earthwork
Anderson Mounds
Middle Woodland Hopewell–Adena 250 BCE–200 CE · Hopewell tradition (Adena antecedent)
Hopewell circular enclosure and Great Mound, 250 BCE–200 CE.
🇺🇸 United States · Megalith
Lepsius Mound Outlier — Mississippi Valley (Cahokia)
Early Bronze Age (3000–2000 BCE) · Medieval
Lepsius Mound Outlier in Mississippi Valley, United States is a Early Bronze Age (3000–2000 BCE) megalithic attributed to Medieval culture.
🇺🇸 United States · Earthwork
Barnes Works
Middle Woodland Hopewell 100 BCE–500 CE · Hopewell
Immense Hopewell enclosure 12 ha west of Bainbridge: square (280 m side) attached to circle (320 m diameter) via parallel walls, with ditch-and-embankment 1.5 m high.
🇺🇸 United States · Ancient city
Lindenmeier Paleo Site — Mississippi Valley (St Louis)
Iron Age (1200 BCE–500 CE) · Classical
Lindenmeier Paleo Site in Mississippi Valley, United States is a Iron Age (1200 BCE–500 CE) ancient city attributed to Classical culture.
🇺🇸 United States · Ancient city
Storage Jar Cache East — Ohio Valley (Columbus)
Iron Age (1200 BCE–500 CE) · Local Neolithic
Storage Jar Cache East in Ohio Valley, United States is a Iron Age (1200 BCE–500 CE) ancient city attributed to Local Neolithic culture.
🇺🇸 United States · Earthwork
Hontoon Island Mounds
St Johns I–II 1000 BCE–1500 CE · St Johns (Mayaou Timucua)
Shell-midden island famous for 6 m buried wooden owl totem (600 CE) and snail-shell ridges.
🇺🇸 United States · Buried city
Cist Grave Field West
Late Neolithic (4000–3000 BCE) · Bronze Age
Cist Grave Field West in Ohio Valley, United States is a Late Neolithic (4000–3000 BCE) buried city attributed to Bronze Age culture.
🇺🇸 United States · Earthwork
Mann Site
Middle Woodland Hopewell 100 BCE–500 CE · Hopewell tradition
Hopewell ceremonial village on Ohio/Wabash, 100 BCE–400 CE.
🇺🇸 United States · Rock-cut
Stepwell Reservoir West
Early Medieval (500–1000 CE) · Iron Age
Stepwell Reservoir West in Southwest, United States is a Early Medieval (500–1000 CE) rock_cut attributed to Iron Age culture.
🇺🇸 United States · Earthwork
Angel Mounds State Historic Site
Mississippian 1000–1450 CE · Mississippian (Angel phase)
42 ha Mississippian walled town 1000–1450 CE.
🇺🇸 United States · Earthwork
Foster Mounds
Coles Creek 700–1200 CE to Plaquemine 1200–1500 CE · Coles Creek–Plaquemine (Troyville to Mississippian transition Louisiana)
Five-mound complex on Little River near Harrisonburg: largest flat-topped Mound A 8 m high with causeway to plaza, four smaller mounds enclosing 1.5 ha plaza.