saguaro national park with winding road through cactus forest, bajada loop drive, arizona

road highway infrastructure mountain valley lane hill plateau ridge landscape asphalt trail tree soil saguaro national park winding cactus forest bajada loop drive arizona mature carnegiea gigantea sonoran desert view overlook tucson usa palo verde ocotillo fouquieria splendens cercidium floridum parkinsonia florida spring red hills blooming blossoms yellow blue sky nature natural environment protected parks west western southwest southwestern north america united states southern