Saguaro cactus (Carnegiea gigantea) along the Ajo Mountain Drive in Organ Pipe Cactus National Monument, Ajo, Arizona, USA, North America

Engelmann's prickly pear cactus (Opuntia engelmannii), saguaro cactus (Carnegiea gigantea) behind, sunset, Sonora desert, Tucson, Arizona, USA

Engelmann's prickly pear cactus (Opuntia engelmannii), saguaro cactus (Carnegiea gigantea) behind, sunset, Sonora desert, Tucson, Arizona, USA

Organ Pipe Cactus (Stenocereus thurberi) in Organ Pipe Cactus National Monument, Ajo, Arizona, USA, North America

"Saguaro Cacti (Carnegiea gigantea) growing in desert with approaching stormclouds, Saguaro National Park, Sonoran Desert, Arizona, USA"

Chain-fruit cholla cactus, also called Hanging chain cholla, Jumping cholla (Cylindropuntia fulgida) in Organ Pipe Cactus National Monument, Ajo, Arizona, USA, North America

Saguaro (Carnegiea gigantea) with full moon, National Park, Sonora Desert, Tucson, Arizona, USA, North America

Saguaro (Carnegiea gigantea) with full moon, National Park, Sonora Desert, Tucson, Arizona, USA, North America

"Saguaro Cactus (Carnegiea gigantea), Organ Pipe Cactus National Monument, Arizona, USA, America"