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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.
🇧🇷 Brazil · Geoglyph
Late Pre-Columbian (200 BCE – 900 CE) · Acre (Beni) geoglyph builders
Western Acre Capixaba 300 m circle ditch 3 m deep with embankment and 120 m square 2 m high under pasture — causeway 400 m links.
🇧🇷 Brazil · Geoglyph
Late Pre-Columbian (200 BCE – 900 CE) · Acre (Beni) geoglyph builders
Western Acre Capixaba 300 m circle ditch 3 m deep with embankment and 120 m square 2 m high under pasture — causeway 400 m links.
🇧🇷 Brazil · Geoglyph
Early to Late Pre-Columbian (400 BCE – 1000 CE) · Acre geoglyph culture / Arawak
Western Ramal triple geoglyph at Capixaba — 3× 120 m squares with 700 m avenue at –10.05S.