🇺🇸 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.
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484 places in the atlas, 33 of them inscribed as UNESCO World Heritage.
🇺🇸 United States · Earthwork
Mississippian, Etowah phase 1000–1550 CE · Mississippian (Muscogean ancestors)
19-m Mississippian Temple mound with copper falcon plates and marble effigies.
🇺🇸 United States · Earthwork
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
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
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
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
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
Late Prehistoric (Patayan) · Yuman (Mojave/Quechan)
9-m Fisherman intaglio (900–1200 CE) on Plomosa piedmont — spearman with fish and sun.
🇺🇸 United States · Earthwork
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
Hopewell Middle Woodland 100–400 CE · Hopewell tradition
Circle-octagon pair 320 m circle, UNESCO 2023.
🇺🇸 United States · Earthwork
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 · Geoglyph
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
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
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
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
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
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
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
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
Late Archaic to late pre-contact St. Johns II (c.800 BCE–1565 CE, major 600–1400 CE) · St. Johns (Ais/Surruque ancestors)
Largest shell mound in mainland United States—St. Johns II / late prehistoric (600–1400 CE) oyster-shell midden-mound 30 ft high (≈15 m) extending 600 ft long × 180 ft wide (≈183×55 m), volume…
🇺🇸 United States · Earthwork
Mississippian Pensacola phase (1250–1550 CE) · Mississippian (Pensacola culture)
Pensacola-Mississippian island capital (1250–1550 CE) on low swamp island (0.4 sq km) in Mobile-Tensaw Delta: 18 platform and burial mounds (largest Mound A 11 m high 90×60 m) enclosing 5 plazas on…
🇺🇸 United States · Earthwork
Plaquemine–Mississippian (700–1500 CE) · Plaquemine-Mississippian (Yazoo Basin)
Major Yazoo Basin mound center (700–1500 CE) with 20+ mounds, plazas and bastioned embankment at Lake George.
🇺🇸 United States · Earthwork
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
Middle Woodland (Hopewell) · Hopewell (Ohio Hilltop)
Hopewell hilltop enclosure (100 BCE–400 CE) on Baker Fork gorge — 2.4-km wall with 33 gates.
🇺🇸 United States · Earthwork
Middle Woodland (Hopewell) · Hopewell (Ohio Scioto)
Hopewell circular enclosure (100 BCE–400 CE) near Bourneville — 120-m ring and 5-m log-tomb mound at Chillicothe.
