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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Verified, partially excavated cisterns

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Cisterns Verified Partially excavated Clear all

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🇸🇾 Syria · Hydraulic works

Resafa (Sergiopolis) — North Basilica Cistern B

Early Bronze to Medieval (3000 BCE–1400 CE) · Hydraulic culture

Resafa (Sergiopolis) — North Basilica Cistern B in Raqqa, Resafa, Syria is a Early Bronze to Medieval (3000 BCE–1400 CE) hydraulic attributed to Hydraulic …