RF2C5M2A8–Entrance sign to the Saguaro National Park in Tucson. The Sonoran Desert in Arizona is the only place in the world where the Saguaro cactus can grow. RF2EGPBFX–Scenic landscape with Saguaro Cactus and dramatic sunset sky in Sonoran Desert National Monument, Arizona, USA RMDM1P2F–Giant Saguaro Cactus (Carnegiea gigantea), Saguaro National Park, West Unit, Tucson, Arizona RF2AT9AK2–Saguaro National Park forest and byways in Arizona desert under blue sky RFJ9K6CJ–Saguaro cactus at sunset in Sonoran desert, Arizona. RMDM1P31–Giant Saguaro Cactus (Carnegiea gigantea), Saguaro West National Park, Tucson, Arizona RF2AT9ANK–Saguaro National Park forest and byways in the Arizona desert under a blue sky RMC5JWYG–Sagaura cactus, Tonto National Forest, East of Phoenix, Arizona. RMDM1P46–Giant Saguaro Cactus (Carnegiea gigantea), Saguaro National Park, West Unit, Tucson, Arizona RMCT5BFC–Ironwood Forest National Monument at sunset in the Sonoran Desert near Eloy, Arizona, USA. RFRR11N4–Scenic views on The Ajo Mountain Loop Road in Organ Pipe Cactus National Monument in south central Arizona on the International border with Mexico RFJ32BMJ–Saguaro cactus at sun set, Coronado National Forest, Santa Catalina mountains, Tucson desert, Arizona, USA RF2AW07Y7–Sonoran desert landscape with saguaro cactus and clouds. Salt River Recreation Area. Mesa, Arizona.