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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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Places tagged res3945 · Mysteria

Tagsres3945

#res3945

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 Archaeological wonders1 Earthworks1 Hydraulic works1

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✓Verified

🇾🇪 Yemen · Hydraulic works

Sadd al-Arim Secondary Dam

Sabaean Kingdom 750 BCE - 570 CE · Sabaean (Saba) kingdom

750 BCE Sabaean secondary saddle dam (420 m) and north sluice extension of Marib, doubling irrigated area via 2.1 km north canal.