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Biosphere 2–The University of Arizona

Located in: Pinal County


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

Phone: 520-838-6200

Fax: 520-838-6162

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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 950 reviews
  • #2 of 8 things to do in Oracle
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Maybe not what it once was!

We arrived at about 10:30am and there was already a significant line. They seemed very disorganized with only one clerk open. It took about 30 minutes in line and while we waited patiently, they...

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Well worth the visit. We've been twice and learned a ton. Taylor was our tour guide and did a great job. Don't take biosphere 1 (earth) for granted. 🙏🏻👍💜💜

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Best attraction in the Tucson area

Any time I have friends visiting I always take them to the Biosphere! And, they are blown away. I've been there over 10 times now, and still love it. Be sure to read up on it first, interesting...

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  • Wheelchair Accessible

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