This "Museum" is all outdoors, like nothing I've ever seen before, as a native New Yorker. There is a surprise around every corner. The tour guide told us the names of the different plants, trees and cacti and, suddenly, you turn around a corner and there is a live Puma or Mountain Lion! There were Black Bears (really red), wolves, and the cutest Prairie Dogs. I know they are rodents, but still ... they were very funny and cute. Of course, the animals are behind glass but in their natural habitat, albeit man-made caves, in the middle of the desert. It was an exciting place to visit, and while there is a lot of walking, there are also stone benches every few yards, so you can sit and rest when necessary. A must see if ever you are in Tucson.