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Tourists visit a famous monument, the Treasury, at the rock-carved rose-red city of Petra, Jordan, 27 July 2018 (issued on 29 July 2018). Jordan's ancient city of Petra, one of the most famous archaeological sites in the world, is believed to have been settled as early as 9,000 BC, and it possibly began to prosper as the capital of the Nabataean Empire from the 1st century BC. Petra is designated a World Heritage Site since 1985. (Photo by Yahya Arhab/EPA/EFE)
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