🇺🇸 United States · Earthwork
Grand Village of the Natchez
Plaquemine to Historic Natchez (1200–1730 CE) · Plaquemine / Natchez (Muskogean)
Natchez historic capital (1200–1730 CE) — 3 Plaquemine mounds and plaza where French witnessed 1725 sacrifice.
🇺🇸 United States · Earthwork
Chavín de Huántar Plaza South — Colorado Plateau (Flagstaff)
Early Medieval (500–1000 CE) · Iron Age
Chavín de Huántar Plaza South in Colorado Plateau, United States is a Early Medieval (500–1000 CE) earthwork attributed to Iron Age culture.
🇺🇸 United States · Earthwork
Monte Albán Terrace South
Iron Age (1200 BCE–500 CE) · Local Neolithic
Monte Albán Terrace South in Colorado Plateau, United States is a Iron Age (1200 BCE–500 CE) earthwork attributed to Local Neolithic culture.
🇺🇸 United States · Earthwork
High Bank Works
Hopewell Middle Woodland 100–400 CE · Hopewell tradition
Circle-octagon pair 320 m circle, UNESCO 2023.
🇺🇸 United States · Earthwork
Pharr Mounds
Middle Woodland Miller culture contemporary with Hopewell 1–400 CE · Miller (Hopewell-influenced eastern Woodland); Hopewell
Eight low dome mounds (2–6 ft high) at Natchez Trace Milepost 286.7, best-preserved Middle Woodland mound group in northeast Mississippi.
🇺🇸 United States · Earthwork
Spiro Mound Craig Hollow Chamber
Formative to Mississippian (1500 BCE–1500 CE) · Woodland–Mississippian
Spiro Mound Craig Hollow Chamber in Oklahoma, Spiro, United States is a Formative to Mississippian (1500 BCE–1500 CE) earthwork attributed to Woodland–Mississippian.
🇺🇸 United States · Earthwork
Etowah Mound C Burial 57
Formative to Mississippian (1500 BCE–1500 CE) · Woodland–Mississippian
Etowah Mound C Burial 57 in Georgia, Cartersville, United States is a Formative to Mississippian (1500 BCE–1500 CE) earthwork attributed to Woodland–Mississippian.
🇺🇸 United States · Earthwork
Cowan Creek Circular Enclosure
Middle Woodland / Hopewell (100 BCE – 400 CE) · Hopewell
Cowan Creek Circular Enclosure in Ohio, United States is a Middle Woodland / Hopewell (100 BCE – 400 CE) earthwork attributed to Hopewell culture.
🇺🇸 United States · Earthwork
Stubbs Earthworks
Middle Woodland Hopewell (100 BCE–200 CE) · Hopewell (Little Miami)
Massive Hopewell enclosure at confluence of Turtle and Little Miami Rivers, 700 m long irregular rectangular enclosure (12 ha) with 1.5 m embankments and deep 2 m exterior ditch, featuring timber…
🇺🇸 United States · Earthwork
Shiloh Indian Mounds
Mississippian (Shiloh phase, 1000–1350 CE) · Mississippian (Western Tennessee)
Fortified Mississippian town (1000–1350 CE) with 7 mounds and 2 km palisade on Tennessee River bluff, Shiloh.
🇺🇸 United States · Earthwork
Lower Chaco Canyon Necropolis B — Chaco Canyon (55-30)
Medieval (regional) · Medieval
Lower Chaco Canyon Necropolis B — Chaco Canyon (55-30) at Chaco Canyon, United States is a Medieval (regional) earthwork of the Medieval tradition, built c.
🇺🇸 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.
🇺🇸 United States · Earthwork
Serpent Mound — Head Coil North Bend (Adams County)
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 · Earthwork
Hopeton Earthworks
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 · Earthwork
Seip Earthworks — North Circle Ancillary (Ross County)
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
Newark Earthworks
Hopewell culture 100 BCE–500 CE · Hopewell (Adena descended, Algonquian? cohort)
Hopewell giant geometric enclosures marking 18.6-yr lunar cycle.
🇺🇸 United States · Earthwork
Haida Mortuary Pole Base South
Early Bronze Age (3000–2000 BCE) · Medieval
Haida Mortuary Pole Base South in Great Plains, United States is a Early Bronze Age (3000–2000 BCE) earthwork attributed to Medieval culture.
🇺🇸 United States · Earthwork
Toolesboro Mounds
Middle Woodland Hopewell 200 BCE–500 CE · Hopewell (Havana Hopewell)
Iowa's premier Hopewell center: 7 surviving mounds (originally 12) including large conical Mound 2 (8 m high) and linear Mound 7 on blufftop above Iowa-Mississippi confluence.
🇺🇸 United States · Earthwork
Fort Hill Earthwork and Nature Preserve
Hopewell Middle Woodland 100–400 CE · Hopewell tradition
14.6 ha hilltop enclosure 2.4 km wall, 33 gateways.
🇺🇸 United States · Earthwork
Plum Bayou Mounds
Late Woodland Plum Bayou 650–1050 CE (Baytown-Coles Creek to Mississippian transition) · Plum Bayou (Baytown/Coles Creek, Late Woodland Arkansas)
Premier Late Woodland platform mound center: 18 mounds (tallest Mound A 12 m) enclosing 16 ha plaza with embankment ditch and astronomical causeway aligned to 1-degree solar solstice.
🇺🇸 United States · Earthwork
Poverty Point Mound B Summit
Formative to Mississippian (1500 BCE–1500 CE) · Woodland–Mississippian
Poverty Point Mound B Summit in Louisiana, West Carroll Parish, United States is a Formative to Mississippian (1500 BCE–1500 CE) earthwork attributed to Woodland–Mississippian.
🇺🇸 United States · Earthwork
Leake Mounds
Middle Woodland to Early Mississippian (Swift Creek–Cartersville) · Woodland (Swift Creek) / Early Mississippian
Moated Swift Creek town (300 BCE–650 CE) with 3 mounds and circular ditch on Etowah River, Georgia.
🇺🇸 United States · Earthwork
Junction Group Earthworks
Middle Woodland Hopewell (100 BCE–500 CE) · Hopewell tradition
Unusual Hopewell (100 BCE–500 CE) enclosure complex at confluence of Paint Creek and North Fork, comprising nine geometric elements—four circles, two squares, crescents and parallel walls—covering 26…
🇺🇸 United States · Earthwork
Crystal River Mounds
Middle Woodland (Deptford–Weeden Island, 200 BCE–750 CE) · Deptford–Weeden Island (Florida Woodland)
Woodland plaza center (200 BCE–750 CE) with 6 mounds and Hopewell exotics on Crystal River estuary, Florida.