The Desert Museum is a great place to bring out of town visitors to learn about the beauty of the Sonoran Desert. The landscaping is beautiful and there are great animal exhibits. What I like is that it's not so large that it overwhelms. For Tucson residents, I recommend the membership for $50 that included unlimited admissions for the year for 2 adults plus kids. They also throw in several free guest passes plus free iced teas at the cafe.