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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 1209 reviews
  • #2 of 10 things to do in Oracle
  • Show Reviews

Great for science types

We visited here on Monday Feb 24. Great place to spend some time. Recommend you get there early and sign up for any tours that interest you. We did the general tour (great) and the history tour...

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Biosphere 2

Get there early! If you arrive after noon you will be waiting in line! What an amazing experience! University of Arizona does an amazing job educating the public with this facility! It was a bit of...

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Under The Glass Tour

Fascinating tour of the closed-system research facility. The tour takes you through desert, rain forest, mangrove, and savanna biomes. Also included is some of the technology behind the research...

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  • Wheelchair Accessible

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Meeting Facilities

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

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