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Grand Canyon, USA – UNESCO World Heritage
#UNESCO #PatrimonioMundial #WorldHeritage #PatrimoineMondial #Welterbe #Philately #Filatelia #Sellos #Stamps #Timbres #Philatelie #Briefmarken #UNESCOWorldHeritage #GrandCanyon #GrandCanyonNational park #NorthKaibabTrail #Arizona