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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
Open 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

Read all 863 reviews
Visitor rating
  • 365
  • 287
    Very good
  • 130
  • 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 6 days ago
Ed P
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863 Reviews from our TripAdvisor Community

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Showing 842: English reviews
Tucson, Arizona
Level Contributor
65 reviews
17 attraction reviews
common_n_attraction_reviews_1bd8 10 helpful votes
Reviewed yesterday NEW

This is a 'must see' for anyone living in or visiting the Tucson area. It is currently owned and operated by the University of Arizona. From the history of this place, to the current research being conducted by the University, it is interesting for children to grandparents and everyone in between. The more times I visit, the more I learn.... More 

Thank grb53
Park City, Utah
Level Contributor
337 reviews
71 attraction reviews
common_n_attraction_reviews_1bd8 95 helpful votes
Reviewed 3 days ago NEW

Go visit this place! It is very interesting and educational. Plan on at least 2 hours there and take water to drink. Go online to really see what is there.

Thank fuz13
1 review
Reviewed 5 days ago NEW

This place is just weird. It is pricey and they shuffle you along through with a bunch of signs that just say TOUR---->. There is an odd video you see at the start of the tour that serves as a commercial for the place you're already at. I remember phrases like "scientifically important" being repeated but never explaining what they... More 

Thank Caitlin B
Level Contributor
48 reviews
27 attraction reviews
common_n_attraction_reviews_1bd8 8 helpful votes
Reviewed 6 days ago NEW

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 81 helpful votes
Reviewed 1 week 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
103 reviews
37 attraction reviews
common_n_attraction_reviews_1bd8 44 helpful votes
Reviewed 1 week 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 2 weeks ago

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 2 weeks ago

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
137 reviews
53 attraction reviews
common_n_attraction_reviews_1bd8 19 helpful votes
Reviewed 2 weeks ago

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 3 weeks ago

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

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Questions & Answers

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Charlotte, North Carolina
9 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?