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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Roman engineerings in Spain · Mysteria

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Roman engineerings in Spain

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Roman engineerings

🇪🇸 Spain

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🇪🇸 Spain · Hydraulic works

Segovia Roman Aqueduct

Roman Imperial (mid-1st to early 2nd c. CE) · Roman Hispania Tarraconensis (Segovia)

Augustan 28.5-m 167-arch granite aqueduct 20 km 30 L/s without mortar, UNESCO 311.