Saguaro Cacti (Carnegiea gigantea) silhouetted at sunset in the Tucson Mountains West unit, Saguaro NP, Arizona, USA, ATMOSPHERIC,CACTI,CACTUS,DESERTS,DUSK,LANDSCAPES,north america,NORTH AMERICA,PLANTS,RESERVE,SILHOUETTES,SUNSET,USA,VERTICAL, Jack Dykinga
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