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An atlas of Earth’s mysterious places — megaliths, pyramids, lost and sunken cities — with the evidence shown plainly: what is verified, what is contested, and what is still unknown.

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© 2026 Mysteria. Exploring the ancient world.Map © OpenFreeMap · OpenMapTiles · OpenStreetMap contributors

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Tagscopper-plate

#copper plate

1 place carries this tag, across every kind and continent it appears in.

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Verified1 Widely accepted0 Contested0 Hypothetical0 Unverified0 Pseudoarchaeology0

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Ancient cities1 Earthworks1 Mounds1

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🇺🇸United States1

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✓Verified

🇺🇸 United States · Earthwork

Lake Jackson Mounds Archaeological State Park

Fort Walton Mississippian 1050–1500 CE · Fort Walton (Apalachee) Mississippian

Mississippian chiefdom capital on Lake Jackson with 11 m platform mound and famed repoussé copper plates.