I've volunteered with Cheyenne Mountain Zoo in their little education building that has all the reptiles. I will say that CMZ is the BEST zoo I have ever visited and the keepers and staff are wonderful. They really are like a family, and they have made many many improvements to their exhibits. What I love about this zoo is that they keep MODERN. Denver and Pueblo, and so many other zoos still have their animals in the tiny historical cages. While I love that they still have their historical exhibits, they should not house animals in them. Something that CMZ understands. Anyway, I LOVE volunteering with CMZ!! I was so sad that I didn't have the time this summer.