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Biosphere 2

Certificate of Excellence
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Address: 32540 S Biosphere Rd, Mile marker 96.5, Oracle, AZ 85623-7019
Phone Number:
09:00 - 16:00
Closed now
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Sun - Sat 09:00 - 16:00
Recommended length of visit: 2-3 hours

Visitors can observe nature in a controlled state at this world-famous...

Visitors can observe nature in a controlled state at this world-famous steel and glass research center where desert, forest, ocean and other ecosystems are monitored and studied.

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TripAdvisor Reviewer Highlights

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Visitor rating
  • 367
  • 289
    Very good
  • 132
  • 37
  • 23
Amazing scientific research facility!

Definitely worth the trip from Tucson. Now run by the University of Arizona, the Biosphere has gained renewed purpose. The tour guides are very well versed and informative. The... read more

Reviewed 4 weeks ago
Ed P
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870 Reviews from our TripAdvisor Community

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Showing 848: English reviews
Level Contributor
48 reviews
27 attraction reviews
common_n_attraction_reviews_1bd8 8 helpful votes
Reviewed 4 weeks ago

Definitely worth the trip from Tucson. Now run by the University of Arizona, the Biosphere has gained renewed purpose. The tour guides are very well versed and informative. The engineering feat is a wonder. We visited while the original living facilities were receiving a facelift and did not get a chance to see much of the living area.

Thank Ed P
Brussels, Belgium
Level Contributor
211 reviews
77 attraction reviews
common_n_attraction_reviews_1bd8 82 helpful votes
Reviewed 4 weeks ago

I first visited the place just after it opened in 1991. I haven't been back until visiting friends wanted to see the site. We were guided around the remaining biomes and were shown how the structure operates. This is an amazing piece of history. We were told how the place is run now and future plans being carried on. I... More 

1 Thank Andy W
Level Contributor
102 reviews
37 attraction reviews
common_n_attraction_reviews_1bd8 44 helpful votes
Reviewed 4 weeks ago via mobile

Our family of four (two adults and two teenagers) thoroughly enjoyed our couple-hour visit here. Great guided tour that featured both historical information as well as how this hub for science can benefit society as well. Our scientist-wannabe daughter loved this but we all got something out of it.

Thank paul-delaware
Calgary, Canada
Level Contributor
49 reviews
17 attraction reviews
common_n_attraction_reviews_1bd8 16 helpful votes
Reviewed 11 April 2017

I visited here with a 10 year old and a teenager. We all found the experience interesting and informative. There are many warnings about the length of the tour and the number of stairs. I am not a very fit person but I no problem completing the tour without even raising my heart rate.

Thank Happygoomom
Oahu's Windward Coast, Hawaii
Level Contributor
50 reviews
27 attraction reviews
common_n_attraction_reviews_1bd8 29 helpful votes
Reviewed 10 April 2017

A bit out of the way, but well worth the drive. Plan at least 4 hours to explore the facility which housed 8 people for 2 years. The guided tour is 90 minutes and really covers in detail how they lived under this closed environment. After the tour, you can re-visit the many points of interest, including the preserved living... More 

Thank ChrisinPuna
Claremont, California
Level Contributor
143 reviews
56 attraction reviews
common_n_attraction_reviews_1bd8 21 helpful votes
Reviewed 9 April 2017

astonishing scene of scientific research with the Tale of Two Years Isolation Immersion to entertain.

Thank JulieStoneybrook
Los Angeles, California
Level Contributor
10 reviews
6 attraction reviews
common_n_attraction_reviews_1bd8 6 helpful votes
Reviewed 5 April 2017

The family visited the Biosphere 2. Insightful guide. Loved the information we learned about it. A little sad that some of the experiments altered the original biome, but that's science. Glad we stopped by. It was on my bucket list. :)

Thank 1234kidsintow
Poulsbo, Washington
Level Contributor
120 reviews
32 attraction reviews
common_n_attraction_reviews_1bd8 34 helpful votes
Reviewed 5 April 2017 via mobile

We have had this on our spring break list for a number of years and finally made the effort for the 1:20 minute drive. We arrived at 10:45 and just missed the 11:00am group. We were told we would be put into the 11:30 tour which allowed us to wander around the premise. Our tour started promptly at 11:39 with... More 

Thank Novaart
Lancaster, California
Level Contributor
25 reviews
14 attraction reviews
common_n_attraction_reviews_1bd8 9 helpful votes
Reviewed 5 April 2017

For anyone old enough to remember the original experiment this is a must see attraction. Even our teenagers who had never heard of the Biosphere2 said it was their favorite thing on our vacation. The tour is very informative with plenty of opportunity to ask questions. Be aware that there are quite a lot of stairs to climb throughout the... More 

Thank Graceracer
Tucson, Arizona
Level Contributor
7 reviews
3 attraction reviews
Reviewed 4 April 2017

We did the walking tour which took about an hour and a half for the guided portion and approximately another 45 minutes for the self-guided tour. Lots of information on the different types of biomes and how they're interconnected. It's a little out of the way, but worth the trip. Funding is provided by visitors so go support some science!

Thank knightsofni314

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Questions & Answers

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Charlotte, North Carolina
10 months ago
Richmond, Minnesota
Goodyear, Arizona
over a year ago

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Typical questions asked:
  • Do I have to buy a ticket for my infant?
  • How do I get there using public transportation?
  • Is there a restaurant or café onsite?