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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 1145 reviews
  • #2 of 9 things to do in Oracle
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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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So much to learn and explore!

Great tour! Very thorough and absolutely worth the price of admission. Our tour guide was knowledgeable and enthusiastic. They also use a great audio system on the tour. Everyone gets headphones that...

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great experience

great place to learn and have fun. We took our 10 year old grandson and we all had a great time. Tour was very informative.

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  • Wheelchair Accessible

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Meeting Facilities

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