saguaro cacti at southwest desert sunset in organ pipe cactus national monument, arizona

wilderness mountain tree landscape valley plateau nature rock ridge geology flower plant hill badlands terrain trail adventure organ pipe cactus national monument ajo desert morning light southern arizona large usa stenocereus thurberi palo verde saguaro ocotillo barren sonoran mount yellow flowers north america southwest southwestern outdoor outdoors natural enviroment cacti park shrubs plants flora rugged spring blossoms early sunset road sun drive setting united states