I would strongly suggest visiting the
Sonora Desert Museum. Think of it as a combination botanical garden and zoo. If you've never been to Arizona, or haven't made it a point to explore the landscape, this is a must-see. You have to drive through part of
Saguaro National Park to get there, which is incredibly scenic (imagine a forest composed entirely of
Saguaro cactus with switch-backs and incredible views that reach all the way into Mexico), and the museum itself is absolutely stunning. Great views, amazing flora and fauna, a decent sit-down restaurant as well as quality counter service, programs throughout the day, and it really provides you with an in-depth glimpse into the wildlife and vegetation of southern Arizona. A beautiful place my wife and I visit a few times a year. And as the weather starts to cool things are really starting to grow again.
I would highly recommend it.
I always forget about that place. He's right, Rowdy, I'd pick the Museum over Old Tucson any day.
Having grown up in a small town in the desert near Tucson and basically lived there until I moved to Phoenix in '97, I forget how many other folks find it so beautiful and interesting. To me, coyotes, mountain lions, scorpions, rattlesnakes, cacti, mesquite trees and the like are just life, not WILDlife.

It's a blast, though. Especially if you can get the tarantula guy to let the thing crawl on you. Muy bueno.