The history of this place has had its ups and downs but it is now managed by the University of Arizona. The excellent self guided tour is about a miles worth of walking and takes about 90 minutes or so ($25 for seniors). There are about 121 informative stops (you should pre load the tour to your phone) which provide lots of detail on the history and current status of this sort of exceptional facility.

The high degree of naivete exhibited by the project managers and participants is incredible. It illustrates how ideology can dominate thought and overcome science. That aside, it is an exciting facility to visit. The tour is well set out, the app gives you a short explanation at each stop, and one need only follow the arrows painted on the ground to learn. Be sure to listen with a critical ear, and you’ll hear some internal contradictory statements even within one stop. However, many, if not most, zoos and other outdoor locations would do well to examine and copy Biosphere’s tour and marking system. It is excellent.

The self guided tour was very well done, listening through our own devices. We also did the Library and personal residence tour with a guide and it was definitely worthwhile. This was very interesting and just a short drive from downtown Tucson. Be sure to listen to the podcast they send a link for on your drive there.

Well worth it. Fascinating. I use a walker and I was nicely accommodated. However, if you decide to go into the rainforest/ocean part there are a lot of steps. My husband was a great sport and carried my walker up the steps. It’s also hot and humid in that part ( duh- it’s a rainforest) so keep that in mind.

Fascinating!! Well done!! I learned so much. Very clean, good restrooms and water bottle filling stations. Wear layers because you will be 50% inside 59% outside. The surrounding views are amazing as well. A beautiful place!

I love this sci-fi stuff. The facility is a bit of a drive through the dessert. Coming from a big city, I enjoyed the drive to get here. The facility is huge! But to get the most out of the experience, get the behind-the-scenes tour. I was able to learn from the staff the full details of what the experiment was. Will come again.

This is a SELF-GUIDED tour, you will need to download an app to follow along. Entry price is a little steep for what you get, BUT part of it goes toward continuing to fund the projects contained within. Lots of walking inside and out, around this large campus. A unique spot. Now run/used by the University of Arizona for active research. Past history well documented in film & news articles. Worth visiting if you're into science.

The Biosphere was more in my husband’s hit list than mine but it is an incredibly interesting piece to visit. The history and science of Biosphere 2 is fascinating. Whether you are interested in science, climate change or space, or enjoy the different environments created there is something for everyone. The tour requires downloading of an app to guide you around and there is a lot of walking involved including stairs and outdoors. We visited on a sunny September day and it was very hot at some of the stops. There are plenty of places to refill water bottles.