Here is the second part of Don Wildman's Off Limits scrapbook - featuring New York, Arizona and more.
You can actually visit and take a tour of Biosphere 2, located outside of Tucson. I always wanted to see the Biospehere domes—I’m a big Buckminster Fuller fan. The Bios are not domes, more like pyramids, but they represent a truly bold endeavor. Say what you will about the success or failure of that endeavor, it is now being used to further our understanding of the environment.