It seems logical Arizona would name a national park after its state flower, the Saguaro Cactus Blossom. Located in Tucson, the 90,000 acre park protects various cactus species. One is the Arizona Barrel Cactus. This succulent blooms with small yellow and orange flowers on the top in the spring. Cars are only allowed along an eight-mile loop. There are also many hiking trails for you to enjoy, assuming you can tolerate the heat.