Find a Hotel

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

Visit Website


  • 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 998 reviews
  • #2 of 9 things to do in Oracle
  • Show Reviews

Very interesting look into the science of the enviroment

Our tour guide - Gabby - was excellent! We really enjoyed the tour and learning more about Biosphere. The walk, to us, was easy though I expect some might have a problem as there were multiple sets...

Read full review

Guide was excellent

But unless you are interested in the studies that the University of Arizona is doing at this site, it may not be the best use of your leisure time. Bring water and be aware (especially in the summer...

Read full review

Very Interesting

Took my 12 year old grandson, he enjoyed it as well. Educational and fun !!! There was a group from the nearby college with their professor, it is truly multigenerational. Not recommend for...

Read full review


  • Wheelchair Accessible

See More