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Biosphere 2

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Address: 32540 S Biosphere Rd, Mile marker 96.5, Oracle, AZ 85623-7019
Phone Number: 800-828-2462, 520-825-1289
9:00 am - 4:00 pm
Open now
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Sun - Sat 9:00 am - 4:00 pm

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 727 reviews
Visitor rating
  • 297
  • 244
    Very good
  • 117
  • 30
  • 22
Cool tour, though the place has some issues

The tour was definitely worth it, as was the trip out there, but it had some issues. The tour guide was great. He was enthusiastic, informative, and funny. He gave lots of info... read more

4 of 5 starsReviewed 2 days ago
Austin, Texas
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727 Reviews from our TripAdvisor Community

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Showing 710: English reviews
Austin, Texas
Level Contributor
117 reviews
42 attraction reviews
common_n_attraction_reviews_1bd8 27 helpful votes
4 of 5 stars Reviewed 2 days ago NEW

The tour was definitely worth it, as was the trip out there, but it had some issues. The tour guide was great. He was enthusiastic, informative, and funny. He gave lots of info and details and explained things really well. The tour itself took us to some public places, as well as some private ones, so that was cool and... More 

Thank Maddoggy25
Level Contributor
98 reviews
15 attraction reviews
common_n_attraction_reviews_1bd8 32 helpful votes
4 of 5 stars Reviewed 1 week ago via mobile

My husband and I are very happy that we visited this interesting, landmark. Our tour guide, Ren, was fantastic. His presentation was extremely informative and educational. Definitely worth a stop if your in the area. Be mindful that it's not ideal for those who need assistance with walking. People in wheelchairs can enjoy the views, but not the tour. The... More 

Thank 1caringmom
Level Contributor
4 reviews
5 of 5 stars Reviewed 1 week ago via mobile

Very interesting, great guided tour, even if you know very little about science you would enjoy this tour. I learned so much about the different ego systems and the history of the Biosphere 2. My favorite was the rain forest!

Thank Fawndenarae W
Level Contributor
22 reviews
7 attraction reviews
common_n_attraction_reviews_1bd8 7 helpful votes
5 of 5 stars Reviewed 1 week ago

You may think that this is just for STEM nuts or College kids, but this is an awesome and even educational experience for anyone. Bring your walking shoes and be prepared for climate changes inside. The views are awesome and so is the history.

Thank Dawn C
Oracle, Arizona
Level Contributor
16 reviews
5 attraction reviews
5 of 5 stars Reviewed 1 week ago

The first time I went to Bio2 was 1994 at the event marking the exit of the 'Biospherians' from the isolated enclosure and have visited it a number of times since. I was impressed by the structures and how the system operated. The design is very 'science fictiony'- you can imagine such a structure on Mars or the moon. The... More 

Thank ivgotit2
Level Contributor
32 reviews
15 attraction reviews
common_n_attraction_reviews_1bd8 6 helpful votes
4 of 5 stars Reviewed 2 weeks ago via mobile

I asked a question on Trip Advisor as to whether it might be too hot for me to go on the tour at the Biosphere in August. I received two replies telling me there would be no problem. Still I decided not to go with the rest of my group. They came home exhausted. Said they enjoyed the tour, but... More 

Thank Linda S
Potsdam, New York
Level Contributor
45 reviews
31 attraction reviews
common_n_attraction_reviews_1bd8 8 helpful votes
3 of 5 stars Reviewed 2 weeks ago

Seeing Biosphere II and hearing about the science being done there was amazing. The physical structure is fantastic and how it works amazing. The tour, while allowing you to see the place in detail, was very long for the info covered and the group size way too large. A lot of the time we couldn't all fit in spots or... More 

Thank LST2323
Penang Island, Malaysia
Level Contributor
91 reviews
22 attraction reviews
common_n_attraction_reviews_1bd8 41 helpful votes
2 of 5 stars Reviewed 2 weeks ago via mobile

This is a tour based attraction, meaning you show up and follow a tour guide around the facilities. Feels like you need to watch some movie that was based on this place. In the 90's, they put 8 people in there to see if we can colonize mars. The amazing parts of the place is the rainforest jungle that has... More 

Thank NeeShen
Kilgore, Texas
Level Contributor
102 reviews
32 attraction reviews
common_n_attraction_reviews_1bd8 76 helpful votes
4 of 5 stars Reviewed 3 weeks ago via mobile

Ever since reading about Biosphere 2 as a kid in my National Geographic and Ranger Rick magazines, I have had an interest in this spot. When I found out it was somewhat near Tucson and we were already going to be there on a trip, I really wanted to make the trek out to see it for myself. I was... More 

Thank BigHilda
Tucson, Arizona
2 reviews
5 of 5 stars Reviewed 3 weeks ago

Bio 2 is a must visit. Spectacular views, historical, educational, entertaining and mind blowing. I learned so much! It's perfect for all ages. The staff and tour guides are all so friendly and knowledgeable. I can't say enough about my visit there and what a great time it was. MJ Burns

Thank AZStagecoach

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Questions & Answers

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