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Tourists visit an alley in Chefchaouen, Morocco, on Aug. 24, 2019. Chefchaouen is a tourist destination in northern Morocco, known as Morocco's "blue city" for its blue walls and alleys. (Photo by Chadi/Xinhua)
Tourists visit an alley in Chefchaouen, Morocco, on Aug. 24, 2019. Chefchaouen is a tourist destination in northern Morocco, known as Morocco's "blue city" for its blue walls and alleys. (Photo by Chadi/Xinhua)