Cacti on Ajo Mountain Drive, Organ Pipe Cactus National Monument, AZ
Cacti on Ajo Mountain Drive, Organ Pipe Cactus National Monument, AZ. President Franklin D. Roosevelt created Organ Pipe Cactus National Monument on April 13, 1937. The monument protects a diverse section of the Sonoran Desert, 95% of which is designated wilderness. It hosts twenty-six species of cacti, including its namesake, the organ pipe cactus, as well as the giant saguaro. The monument has been home to Native American, Mexican, and European groups, and was formerly the intersection of many trading routes. Mining, ranching, and overgrazing once scarred the land, and evidence from these activities is still apparent today. In 1976, the United Nations declared the monument an International Biosphere Reserve.






