🇺🇸 United States · Earthwork
Marksville State Historic Site
Marksville 0–400 CE · Marksville culture
Semicircular enclosure 530 m wall, Marksville Southern Hopewell 0–400 CE.
🇺🇸 United States · Earthwork
Kincaid Mounds State Historic Site
Mississippian 1050–1400 CE (Kincaid phase) · Mississippian (Caborn-Welborn)
19-mound Mississippian town on Ohio River, 1050–1400 CE.
🇺🇸 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 · 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 · Megalith
Watson Brake Mound — Ohio Valley (Chillicothe)
Iron Age (1200 BCE–500 CE) · Iron Age
Watson Brake Mound in Ohio Valley, United States is a Iron Age (1200 BCE–500 CE) megalithic attributed to Iron Age culture.
🇺🇸 United States · Earthwork
Old Stone Fort
Middle Woodland 80–550 CE · Middle Woodland (Hopewell-related)
2.75 km stone-walled hilltop enclosure, solstice-aligned, 80–550 CE.
🇺🇸 United States · Earthwork
Turtle Mound
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
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
Pinson Mounds State Archaeological Park
Middle Woodland 1–500 CE (Pinson phase) · Middle Woodland (Pinson Mound culture, Hopewell-influenced)
Largest grouping of platform mounds in Tennessee and largest Middle Woodland earthwork complex: 17 mounds (12 platform, burial, effigy) in 1,200-acre Forked Deer River park, with Saul's Mound (Sauls’…
🇺🇸 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 · 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 · 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
Seip Earthworks
Hopewell 1–500 CE · Hopewell tradition
121-acre Hopewell circle-square with 335 m Great Circle and Seip-Pricer mound, UNESCO 2023.
🇺🇸 United States · Earthwork
Shiloh Indian Mounds National Historic Landmark
Early to Middle Mississippian 1000–1350 CE · Mississippian (Shiloh phase)
Palisaded 8-mound Mississippi River town on Tennessee River, 1000–1350 CE.
🇺🇸 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
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 · Archaeological wonder
Bandelier National Monument
Ancestral Pueblo III–IV 1150–1550 CE (Pajarito Plateau settlement after Mesa Verde diaspora) · Ancestral Puebloan / Keresan and Tewa (ancestors of Cochiti, San Ildefonso, Santa Clara)
13,355 ha of Frijoles Canyon with tuff cliff dwellings (cavates), mesa-top Tyuonyi Pueblo (400 rooms, 1–3 storeys) and Long House cliff village (800 m long) in soft Bandelier Tuff (1.1 Ma Jemez…
🇺🇸 United States · Megalith
Bighorn Medicine Wheel
Late Prehistoric 1200–1700 CE · Plains Indians
24 m medicine wheel 28 spokes, solstice alignments.
🇺🇸 United States · Archaeological wonder
Canyons of the Ancients National Monument
Basketmaker II–Pueblo III 1500 BCE–1300 CE (peak 1000–1300) · Ancestral Puebloan (Anasazi, Basketmaker to Pueblo III)
Largest archaeological landscape in US implying 30,000 people: 176,000-acre (71,200 ha) monument with 6,355 recorded sites – villages, cliff dwellings, kivas, towers and shrines from Basketmaker to…
🇺🇸 United States · Archaeological wonder
Casa Malpais Archaeological Park and National Historic Landmark
Mogollon–Ancestral Puebloan 1260–1350 CE · Mogollon–Ancestral Puebloan
60-room basalt Great House 1260–1350 CE, Great Kiva solar calendar.
🇺🇸 United States · Earthwork
Cedar-Bank Works
Early to Middle Woodland (1000 BCE–300 CE) · Adena – early Hopewell
Paired Adena (1000–100 BCE) and Hopewell-era enclosures on left bank of Scioto 5 mi north of Chillicothe: large 350-m-diameter circular enclosure (12 ac) with interior ditch and 1.5 m embankment plus…
🇺🇸 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
Fort Walton Mound
Mississippian Fort Walton 1100–1550 CE · Fort Walton (Mississippian Pensacola variant)
Fort Walton culture temple mound on Choctawhatchee Bay, 1100–1550 CE.
🇺🇸 United States · Archaeological wonder
Gila Cliff Dwellings National Monument
Mogollon Tularosa 1275–1300 CE · Mogollon
46 rooms in five caves 1275–1300 CE, Mogollon.