tall saguaro cacti on a desert mountainside with palo verde bushe and dry scrub 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 hiking harsh environment ecosystem rugged bucket list west america rocky blue sky wispy clouds carnegiea gigantea ocotilla fouquieria splendens pima county sus picnic area palo verde large trail dirt path mountainside tall bushe dry scrub