Biosphere 2

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32540 S Biosphere Rd
Oracle, AZ 85623
Biosphere 2 is open for public tours every day of the year except Christmas Day and Thanksgiving Day. The tour is an interesting combination of history and current research. Comfortable walking shoes are recommended.

Reviews

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4.0305 reviews
Photo of Jamiee W.
Jamiee W.
11/22/2025

What a cool place! Learned loads about how scientists tried to replicate what the earth does so they could do different earth science tests in a controlled environment. Still so much testing and...

Photo of Michael G.
Michael G.
3/27/2025

We have never met a museum that we didn't love and Biosphere 2 delivers. What a checkered history it has, and it is now owned and operated by U of Arizona. The tour is self guided with the app...

Photo of Natalie S.
Natalie S.
5/11/2025

We love the Biosphere and are considering getting an annual membership. It's about 50 minutes from the university and a great place to get away from Tucson for a few hours. The staff is always...

Photo of Emily S.
Emily S.
3/4/2025

Great experience!!!! Learned so much about the history and research and love that it's still being used for research today. We opted to book the optional/additional lung and library tours and glad...

Photo of Martha C.
Martha C.
3/22/2025

We were excited to take our 11 year old granddaughter to the Biosphere 2. The weather was perfect. My granddaughter was so interested in everything. The self guided tour was amazing.

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