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Biosphere 2–The University of Arizona

Pinal County

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

Phone: (520) 621-4800



  • 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 1154 reviews
  • #2 of 10 things to do in Oracle
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Family Road Trip

Visited this area 30 years ago when 8 Scientists were attempting to replicate living conditions of Biosphere1. This visit was a whole new experience. Absolutely worth the time and money. The tour...

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Unique building and science lab

I read about Biosphere 2 when I was in high school. It was being featured in a local science magazine as it was being built. So I was happy to be able to visit on our road trip we got in and took the...

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Fun and educational way to spend an afternoon

Took an afternoon tour of Biosphere 2 while in Tucson. After hearing about it all those years ago it was very interesting to actually take a tour of the place. It's definitely worth the time and...

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  • Wheelchair Accessible

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Meeting Facilities

  • Number of Meeting Rooms 2
  • Largest Meeting Room 1862
  • Banquet Capacity 120