Saguaro National Park, AZ/Tucson Mountains. Sunset silhouetting saguaro cactus (Carnegiea gigantea) beneath summer monsoon storm. 793v2
Saguaro National Park, AZ/Tucson Mountains. Monsoon clouds aglow silhouette saguaro cactus (Carnegiea gigantea) after sunset. 793h3
Saguaro National Park, AZ/Tucson Mountain Unit. Saguaro cactus (Carnegiea gigantea) at dawn with emerging flowers at tip of limb. 594v8
