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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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Tagscliff-town

#cliff town

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

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Verification

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Verified1 Widely accepted0 Contested0 Hypothetical0 Unverified0 Pseudoarchaeology0

Category

Ancient cities1 Megaliths1

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Country

🇩🇿Algeria1

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UNESCO World Heritage only

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Partially excavated1

1 place

✓Verified

🇩🇿 Algeria · Ancient city

Tiddis (Castellum Tidditanorum)

Numidian / Roman (Berber stronghold to late antique) · Numidian / Roman

Cliff-hanging Berber-Roman 'mini Delphi' on Guelaa plateau with stepped streets, bazina tombs and aqueducts.