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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 1169 reviews
  • #2 of 10 things to do in Oracle
  • Show Reviews

Awesome place

Found the biosphere very interesting, tour group was small in size and staff friendly and very informative. Made me want to find more information about the 2 year isolation stay that took place at...

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Don't feel bad if you miss this place. -- It's just weird, and if I weren't with a friend who really wanted to go, I would have skipped it. I recommend reading about its history on Wikipedia, if you...

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Dont miss it! Well worth a side trip from Tucson or Phoenix.

Though far off the beaten track, this University of Arizona science park deserves your attention. From the largest indoor rain forest, to the largest indoor ocean, to a mangrove swamp, and chaparral...

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  • Wheelchair Accessible

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Meeting Facilities

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