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Biosphere 2–The University of Arizona

Located in: Pinal County


32540 S. Biosphere Rd.
Oracle, AZ 85623
United States

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  • Green Business
  • Mexico Ready

Visit Biosphere 2 today and find out why Time Life Books named it “One of the 50 must-see wonders of the world!” Three New Themed Tours take you inside the world's largest living research center focused on future life of our planet. Experience the new "Under the Glass" classic, amazing "30 Year History" or engaging "Family " tour.  Highlights of this immersive experience include a new feature movie, multi-media exhibits and a uniquely built indoor trail system with your tour led by a knowledgeable guide. Biosphere 2 is the size of 3 football fields and has a $200 million dollar replicated mini-world.  Beneath 6,500 panes of glass lives a rainforest, million gallon ocean, coastal fog desert, technology grid and much more.  Located at a very scenic cool elevation of almost 4,000 feet at the base of the Tucson Catalina Mountains. Check out our Bookstore & Cafe. Just 20 minutes north of Tucson and 90 minutes south of Phoenix.  Guided adventure tours offered daily! Visit or call (520) 621-4800 OPEN DAILY 

  • TripAdvisor Traveler Rating
    Based on 1125 reviews
  • #2 of 9 things to do in Oracle
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Day Trip from Phoenix

My husband and I are over 70 and found the Biosphere very interesting. They warned us it may be difficult walking and we would travel a distance of 1 + miles but it is an easy walk. I think young...

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An interesting testament to flawed science

It's more than a bit off the beaten path, being an hour or so from the Tucson airport. It's definitely something that's worth seeing if you're in the area, though. The grounds are kept well by the...

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Enjoyable and educational

We took all three tours, which made for about 4 hours non-stop, including walking back up to the top between the general and history tours. The ideal plan would be to get there early enough to start...

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  • Wheelchair Accessible

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