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3 places to sift through. Narrow by kind, country, period or how firmly each one is established — contested and pseudoarchaeological claims are labelled here, never hidden.
🇺🇸 United States · Geoglyph
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
Formative to Late Intermediate (800 BCE–1400 CE) · Andean Formative
Blythe Intaglios — Ancillary Human Figure North (California) in California, Blythe Intaglios, United States is a Formative to Late Intermediate (800 BCE–14…
🇺🇸 United States · Earthwork
Disputed: either Adena 320 BCE–200 CE or Fort Ancient 1070–1200 CE (latest C14 favors Fort Ancient 1120 CE) · Adena culture or Fort Ancient culture
Quarter-mile (411 m) effigy mound in shape of serpent with oval head swallowing an egg, 3 ft high, coiled tail atop meteor-crater plateau above Ohio Brush Creek, largest surviving effigy mound in…
