Saguaro National Park, AZ / Tucson Mountain Unit, with Saguaro cacti, Carnegiea gigantea, silhouetted against the setting sun with swirling storm clouds in background. 704V2
Saguaro National Park, AZ / Sunset over Silver Bell Mountains, with saguaro cacti, Carnegiea gigantea, in the Tucson Mountains silhouetted. 804H10
Monsoon storm at sunset with lightning striking ground behind veils of rain, with silhouetted saguaro cacti, Carngiea gigantea, in foreground.
