desert landscape with saguaro, cholla and prickly pear cacti, palo verde trees, ocotillo, and scrub brush in saguaro national park

saguaro national park tucson mountain district arizona usa botany nature cacti vegetation outdoors spring landscape desert tourism travel adventure vacation sight solitude peaceful creosote bushes hiking harsh environment ecosystem rugged bucket list west america top blue sky wispy clouds carnegiea gigantea ocotilla fouquieria splendens prickly pear opuntia cholla pima county palo verde valley view overlook trail mountainous filled trees ocotillo scrub brush