🇺🇸 United States · Earthwork
Etowah Indian Mounds
Mississippian, Etowah phase 1000–1550 CE · Mississippian (Muscogean ancestors)
19-m Mississippian Temple mound with copper falcon plates and marble effigies.
🇺🇸 United States · Earthwork
Baum Village and Works
Middle Woodland Hopewell (50 BCE–350 CE) · Hopewell (Baum phase)
Hopewell rectangular enclosure (120×110 m, 1.3 ha) with habitation village overlapping embankments atPaint Creek terrace—rare instance where Hopewell domestic occupation directly associated with…
🇺🇸 United States · Earthwork
Marietta Earthworks
Middle Woodland Hopewell (100 BCE–500 CE) · Hopewell (Marietta phase)
Hopewell ceremonial complex (100 BCE–500 CE) at confluence of Muskingum and Ohio Rivers, originally three enclosures: Capitolium Square (150×110 m terraced platform and graded way), Quadranaou double…
🇺🇸 United States · Earthwork
Castalian Springs Mound Site
Mississippian Middle Cumberland (1100–1350 CE) · Mississippian (Castalian Springs phase)
Premier Middle Cumberland Mississippian town (1100–1350 CE) centered on mineral spring: two major platform mounds (Mound 1 6 m high 55×45 m, Mound 2 burial 3 m) plus smaller mound, large plaza and…
🇺🇸 United States · Earthwork
Lake George Mounds at Holly Bluff
Late Woodland to Mississippian (Coles Creek – Lake George phase 700–1500 CE) · Plaquemine / Mississippian (Lake George)
Yazoo Basin Mississippian–Plaquemine center (700–1500 CE, peak 1300–1500): 25 mounds over 40 ha including 8-m-high concial-temple Mound C (55×40 m), flat-top Mound A 12 m high (80×60 m) second…
🇺🇸 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 · Geoglyph
Eastern Chaco Canyon Necropolis West — Chaco Canyon (55-16)
Bronze Age (regional) · Bronze Age
Eastern Chaco Canyon Necropolis West — Chaco Canyon (55-16) at Chaco Canyon, United States is a Bronze Age (regional) geoglyph of the Bronze Age tradition, built c.
🇺🇸 United States · Geoglyph
Old Chaco Canyon Enclosure Inner — Chaco Canyon (55-04)
Bronze Age (regional) · Bronze Age
Old Chaco Canyon Enclosure Inner — Chaco Canyon (55-04) at Chaco Canyon, United States is a Bronze Age (regional) geoglyph of the Bronze Age tradition, built c.
🇺🇸 United States · Earthwork
Turner Group Earthworks
Middle Woodland Hopewell 100–400 CE · Hopewell tradition (Turner phase)
Hopewell enclosure-mound group source of copper effigies and mica tombs on Little Miami terrace.
🇺🇸 United States · Earthwork
High Bank Works
Hopewell Middle Woodland 100–400 CE · Hopewell tradition
Circle-octagon pair 320 m circle, UNESCO 2023.
🇺🇸 United States · Geoglyph
Blythe Intaglios
Late Prehistoric 1000–1500 CE (OSL), possibility Protohistoric · Mojave/Quechan; Patayan culture
Mojave giant desert figures: 50-m human intaglios above Colorado River.
🇺🇸 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
Rock Lake – Aztalan's Sunken Pyramids Claim
Late Woodland effigy mound period (700–1200 CE) · Late Woodland effigy-mound builders (ancestral Ho-Chunk)
Contested submerged 'pyramids' in Wisconsin lake beside verified Woodland effigy mounds on shore.
🇺🇸 United States · Geoglyph
Topock Maze (Mystic Maze) Geoglyphs
Late Prehistoric (Patayan) to Historic · Mojave (Aha Makav) / Quechan
18-acre windrow maze (800–1200 CE) in Mojave Valley — 600-m herringbone pale strips.
🇺🇸 United States · Earthwork
Moundville Mound A Plaza Level
Formative to Mississippian (1500 BCE–1500 CE) · Woodland–Mississippian
Moundville Mound A Plaza Level in Alabama, Moundville, United States is a Formative to Mississippian (1500 BCE–1500 CE) earthwork attributed to Woodland–Mississippian.
🇺🇸 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
Watson Brake Mound E
Formative to Mississippian (1500 BCE–1500 CE) · Woodland–Mississippian
Watson Brake Mound E in Louisiana, Ouachita Parish, 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
Cahokia Woodhenge Post Circle III
Formative to Mississippian (1500 BCE–1500 CE) · Woodland–Mississippian
Cahokia Woodhenge Post Circle III in Illinois, United States is a Formative to Mississippian (1500 BCE–1500 CE) earthwork attributed to Woodland–Mississippian.
🇺🇸 United States · Earthwork
Ortona Indian Mounds
Late Woodland – Glades I–II (300 BCE–1150 CE) · Glades / Calusa tradition (Okeechobee Basin)
Late Woodland–Glades/Calusa affiliated town (300 BCE–1150 CE, peak 550–850) spread 5 sq mi along Caloosahatchee River north bank: 3 sand mounds (Mound A Plaza 3.5 m, Mound B and borrow mound), 2…
🇺🇸 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 · Geoglyph
Bouse Fisherman Intaglio (Fisherman Geoglyph)
Late Prehistoric (Patayan) · Yuman (Mojave/Quechan)
9-m Fisherman intaglio (900–1200 CE) on Plomosa piedmont — spearman with fish and sun.
🇺🇸 United States · Earthwork
Pineland Archeological Site (Calusa Complex)
Caloosahatchee I–V (100–1710 CE, major 500–1500) · Caloosahatchee (Calusa kingdom)
Capital water-court capital (Randell Complex) of Calusa chiefdom (100–1500 CE, historic to 1710): 5 sand-shell mounds up to 9 m high (Brown's Mound 50×45 m), Adam's Mound, Randell Mound, Low Mound…