Saguaros and Organ Pipe Cacti along the Ajo Mountain Drive at Organ Pipe Cactus National Monument, a UNESCO biosphere reserve in southern Arizona
Organ Pipe Cacti along the Ajo Mountain Drive at Organ Pipe Cactus National Monument, a UNESCO biosphere reserve in southern Arizona
Prickly Pear, Saguaros, Organ Pipe and other cactus species along the Ajo Mountain Drive in Organ Pipe Cactus National Monument in Southern Arizona
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