View from inside the Largest Mustatil Yet Identified (IMAGE)
Caption
Mustatils only occur in northwest Saudi Arabia. They had been previously recognized from satellite imagery and as they were often covered by younger structures, it had been speculated that they might be ancient, perhaps extending back to the Neolithic. Image shows view from inside the largest mustatil yet identified, stretching for over 600 metres.
Credit
Huw Groucutt
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