🇺🇸 United States · Rock art
Jeffers Petroglyphs
Archaic to Protohistoric (7000 BP–1700 CE) · Paleoindian through Dakota
Midwest's largest petroglyph site: 4000 carvings 7000 BP–1700 CE on quartzite outcrop tracing 7000 years.
🇺🇸 United States · Earthwork
Hopewell Culture National Historical Park (Mound City Group)
Hopewell 1–500 CE (Middle Woodland, peak 100–400 CE) · Hopewell tradition (Scioto Hopewell)
Finest Hopewell enclosure: 13-acre (5.3 ha) flat-topped earthen-walled enclosure (1,211 m perimeter, 1–1.8 m high) near Scioto River enclosing 24 conical, elongated and effigy mounds.
🇺🇸 United States · Archaeological wonder
Aqueduct Arch Section South — Southwest (Santa Fe)
Early Medieval (500–1000 CE) · Local Neolithic
Aqueduct Arch Section South in Southwest, United States is a Early Medieval (500–1000 CE) archaeological wonder attributed to Local Neolithic culture.
🇺🇸 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
Effigy Mounds National Monument
Late Woodland 500–1200 CE, effigies c.700–1100 CE · Late Woodland (Ancestral Ioway/Ho-Chunk?)
31 bear-and-bird effigy mounds marching on Mississippi bluff.
🇺🇸 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 · Archaeological wonder
Hovenweep National Monument
Pueblo III 1200–1300 CE · Ancestral Puebloan
Six Pueblo tower villages 1200–1300 CE, Square Tower.
🇺🇸 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
Chaco Culture National Historical Park
Pueblo II–III 850–1250 CE (Chacoan fluorescence 1020–1140) · Ancestral Puebloan (Anasazi) / Chacoan
Chacoan canyon with 15 monumental Great Houses (Pueblo Bonito 650 rooms, 35 kivas) and engineered roads, built 850–1150 CE by Ancestral Puebloans as ritual and trade center for San Juan Basin,…
🇺🇸 United States · Archaeological wonder
Blue Hill Meteorological Observatory
The Blue Hill Meteorological Observatory in Milton, Massachusetts is the foremost structure associated with the history of weather observations in the United States.
🇺🇸 United States · Geoglyph
Bouse Northern Wash Intaglios (La Posa Plain Extension)
Late Prehistoric (Patayan II–III) · Patayan / Hakataya (Yuman)
9+ Patayan intaglios (880 BP–1500 CE) on La Posa Plain north of Bouse — Colorado River style.
🇺🇸 United States · Archaeological wonder
Snaketown Ball Court 1
Multi-period (4000 BCE–1000 CE) · Multi-period
Snaketown Ball Court 1 in Arizona, Snaketown, United States is a Multi-period (4000 BCE–1000 CE) archaeological wonder attributed to Multi-period.
🇺🇸 United States · Earthwork
Spiro Mounds
Mississippian Spiro phases Harlan–Sprio 950–1450 CE (Craig Mortuary climax 1200–1400) · Caddoan Mississippian (Spiroan, ancestors of Wichita/Caddo)
Premier Mississippian and Caddoan necropolis and ceremonial center on Arkansas River: 12 mounds (Craig Mound – 10 m high, hollow burial chamber or ‘Spirit Lodge’ with shell-carved ‘Great Mortuary’…
🇺🇸 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 · Ancient city
Blood Run Site
Late Prehistoric Oneota (Blood Run phase 1500–1700 CE) · Oneota (ancestors Dakota-Ioway)
Largest Oneota town 1500–1700: 76 mounds and boulder enclosure, 6,000 residents on Big Sioux.
🇺🇸 United States · Archaeological wonder
Kiln-Anchorage Gateway Archaeological Complex
Iron Age (1200 BCE–500 CE) · Iron Age
Kiln-Anchorage Gateway Archaeological Complex in Ohio, United States is a Iron Age (1200 BCE–500 CE) archaeological wonder attributed to Iron Age culture.
🇺🇸 United States · Archaeological wonder
Walpi Pueblo
Ancestral Hopi (Hisatsinom) to Historic Hopi 900 CE–present · Hopi (Hisatsinom, Hopi-Tewa)
Continuously inhabited 900 CE Hopi terraced pueblo atop 300-m mesa.
🇺🇸 United States · Archaeological wonder
Wupatki National Monument
Pueblo II–III 1120–1250 CE (post-Sunset Crater) · Sinagua / Ancestral Puebloan (Hisatsinom) with Mogollon/Hohokam influences
100-room red-Moenkopi sandstone pueblo with tower-kiva and Hopi-style ballcourt, outlier of Sinagua-Hisatsinom frontier after Sunset Crater eruption (1085 CE) improved farming.
🇺🇸 United States · Earthwork
Moundville Archaeological Park
Mississippian 1000–1450 CE, apogee 1200–1350 CE · Mississippian (ancestral Choctaw/Chickasaw)
29-mound plaza center with grand chief's platform mound above Black Warrior River.
🇺🇸 United States · Earthwork
Town Creek Indian Mound
Pee Dee Mississippian 1150–1400 CE · Pee Dee culture
Pee Dee Mississippian platform mound 1150–1400 CE.
🇺🇸 United States · Archaeological wonder
Chimney Rock National Monument
Pueblo II 1076–1125 CE · Chacoan
Chacoan Great House at 2310 m, lunar standstill alignment 1076–1093 CE.
🇺🇸 United States · Earthwork
Quarry Gallery Americas 79 — United States Region 7
Period Bronze Age · Regional culture Americas-Mound
Quarry Gallery Americas 79 — United States Region 7 in United States Region 7, United States is a Neolithic earthwork with stratified deposits and regional significance.
🇺🇸 United States · Archaeological wonder
Number One Observatory Circle
official residence of the vice president of the United States
🇺🇸 United States · Archaeological wonder
Hopkinton Dam and Spillway
The Hopkinton Dam and Spillway is a historic site at the eastern end of Hopkinton Reservoir in Hopkinton State Park in Ashland, Massachusetts.