Al Jassasiya's 900 "petroglyphs" include unique images of sailing ships and unusual cup shapes that remain a puzzle to experts who say their true meaning may be lost in the mists of time.
Some shoot out of the soft rock like reptiles bathing in the sun. Others are mysterious depressions resembling an ancient board game played all over the world. And a few are straight-up puzzling. On a desolate and windswept corner of Qatar's.
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