Saguaro National Park is right next Tucson in southern Arizona famous for its tall cacti forest. During one of our family trips to the West, we visited the Saguaro National Park. We were amazed by gigantic tall cactus trees. Before visiting Saguaro, I did not know the cactus grows that high. Some of the tall cactus trees seem like 60 feet high or so. Another amazing thing was there are no other trees around in the park although there are certain low lying bushes and flowers. It is such an awe inspiring scene to see a tall mountain completely filled with tall cactus trees otherwise would be completely barren. It is such a unique place and a must see in southern Arizona.