Organ Pipe Cacti along the Ajo Mountain Drive at Organ Pipe Cactus National Monument, a UNESCO biosphere reserve in southern Arizona
Saguaro and Organ Pipe Cacti along the Ajo Mountain Drive at Organ Pipe Cactus National Monument, a UNESCO biosphere reserve in southern Arizona
Saguaros and Organ Pipe Cacti on the rocky slopes of the Ajo Mountain Range in Organ Pipe Cactus National Monument, Arizona, USA
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