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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:
+1 800-828-2462
09:00 - 16:00
Open now
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Sun - Sat 09:00 - 16:00

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 786 reviews
Visitor rating
  • 323
  • 264
    Very good
  • 123
  • 34
  • 22
Once in a lifetime visit

I am very glad we got a chance to see Biosphere 2 despite the fact that the 3 1/2 hours we were there was way too long for us. We got there about a half hour before the tours... read more

4 of 5 bubblesReviewed 2 days ago
Albany, New York
via mobile
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786 Reviews from our TripAdvisor Community

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Showing 766: English reviews
Albany, New York
Level Contributor
628 reviews
165 attraction reviews
common_n_attraction_reviews_1bd8 188 helpful votes
4 of 5 bubbles Reviewed 2 days ago NEW via mobile

I am very glad we got a chance to see Biosphere 2 despite the fact that the 3 1/2 hours we were there was way too long for us. We got there about a half hour before the tours began, and planned to do the history as well as the general tour. I was very interested In it's history and... More 

Thank mcdedrick
Greensburg, Pennsylvania
Level Contributor
231 reviews
32 attraction reviews
common_n_attraction_reviews_1bd8 56 helpful votes
5 of 5 bubbles Reviewed 4 days ago NEW

We visited and toke the tour (which you must do to visit) and thought it well done. It's informative to hear the Mission and history. It took about 90 minutes. You then have some time to wonder about. It's a striking structure.

Thank dchemist
Tehachapi, California
Level Contributor
170 reviews
69 attraction reviews
common_n_attraction_reviews_1bd8 46 helpful votes
4 of 5 bubbles Reviewed 4 days ago NEW

This was an interesting experimental project and is still used for continuing research. The docents are helpful and knowledgeable explaining how this experiment was conducted.The "lung" was amazing. The people working at the Biosphere were all accommodating and helpful. The tamales at the Cafe were quite good. We enjoyed this activity and found it worth the drive to Oracle.

Thank judy r
Level Contributor
2 reviews
5 of 5 bubbles Reviewed 6 days ago NEW

I am visiting Arizona on vacation from Mass. I was looking for fun things to do and this popped up. What an amazing experience. My friend and I arrived wednesday afternoon around 12:45, walked to the main building and bought our tickets. (Discounts for students! Bring your student ID) Totally worth the $20 per person. It is about an 8-10... More 

Thank Susie T
Chandler, Arizona
Level Contributor
140 reviews
41 attraction reviews
common_n_attraction_reviews_1bd8 19 helpful votes
4 of 5 bubbles Reviewed 1 week ago NEW

one time a year, there is a week that you are allowed to walk freely (between x-mas and new year) and this year we were so lucky to have this. Amazing place and you can totally feel the way people lived here for such a while. Great scientists!

Thank Hans J
San Diego, California
Level Contributor
3 reviews
common_n_attraction_reviews_1bd8 2 helpful votes
2 of 5 bubbles Reviewed 1 week ago

2.0 star rating 1/8/2017 I visited the Biosphere 2 in 2009 and again on December 30, 2016, and I was stunned at the difference. The facility now has an overall appearance of being run down and poorly maintained. In addition, when I visited on the 30th of December, 2016, there were no guided tours. In their place, visitors walked through... More 

2 Thank Judith C
Phoenix, Arizona
Level Contributor
199 reviews
50 attraction reviews
common_n_attraction_reviews_1bd8 218 helpful votes
5 of 5 bubbles Reviewed 1 week ago

The tour starts with a short film....a nice intro. Then a docent full of knowledge gives a wonderful and highly interesting tour by foot through the place, even underground. It's a beautiful area and a fascinating place with lots of great stories. There is a lot of walking and a lot of steps involved. Highly recommended.

1 Thank BLBTraveler
Level Contributor
6 reviews
3 attraction reviews
common_n_attraction_reviews_1bd8 3 helpful votes
4 of 5 bubbles Reviewed 1 week ago

The concentration is on all the good things the University is doing with this facility--which is understandable, but the very interesting and controversial history of the project is glossed completely over. The original experiment began with 8 unqualified people and ended in failure--tell me more please. . .

1 Thank John B
Boston, Ma
Level Contributor
85 reviews
35 attraction reviews
common_n_attraction_reviews_1bd8 76 helpful votes
2 of 5 bubbles Reviewed 1 week ago

So I have heard of this place before and my wife wanted to go. So weallthy guy who inherited money from his family donates 150 million dollars so eight people can live in like million square foot facility to study science for year and half.During tour studying rain forest how about water issue in southeast which is becoming a disaster,Sorry... More 

1 Thank pk5500
Ontario, Canada
Level Contributor
79 reviews
39 attraction reviews
common_n_attraction_reviews_1bd8 54 helpful votes
3 of 5 bubbles Reviewed 1 week ago

We took a guided tour at 9:30 in early January. There was a 12 minute film followed by a 45 minute walking tour. The facility itself is amazing and has a number of very neat engineering features. Our guide, while friendly, seemed to be reading from a script. He was unable to "read the group" well and didn't give very... More 

1 Thank Paul P

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Questions & Answers

Here's what previous visitors have asked, with answers from representatives of Biosphere 2 and other visitors
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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?