Ovoo, oboo or obo ceremonial rock pile or cairn with sacred hadags or khadags blue silk scarves on the ice of the entrance of the Yolyin Am or Yoliin Am canyon, the Lammergeier Valley Gorge of Bearded Vultures , Gurvan Saikhan Uul mountain range, Gobi Gurvansaikhan National Park. Gobi desert, Mongolia
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