Biosphere 2

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32540 S Biosphere Rd
Oracle, AZ 85623
Biosphere 2 is open for public tours every day of the year except Christmas Day and Thanksgiving Day. The tour is an interesting combination of history and current research. Comfortable walking shoes are recommended.

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4.0

(310)

Photo of Jamiee W.
Jamiee W.
11/22/2025

What a cool place! Learned loads about how scientists tried to replicate what the earth does so they could do different earth science tests in a controlled environment. Still so much testing and...

Photo of Nicholas R.
Nicholas R.
1/16/2026

To truly enjoy this beautiful landscape you have to watch Idiocracy and focus on the section that describes the Time Machine in Costco. This place is dumb, a reminder of how idiots write grants...

Photo of Willy H.
Willy H.
1/11/2026

Biosphere 2 is a science and engineering wonder! It is a great place to show human's effort to recreate different ecosystems in controlled environments. Great learning experiences for kids and...

Photo of Emil C.
Emil C.
12/26/2025

I got to check this place out a little bit when I was out here for the Tucson Marathon. The race had used this venue and the surrounding roads as the starting area for the race. Its name is...

Photo of Chris H.
Chris H.
12/20/2025

I took a tour while I was vacationing in Tucson. The different greenhouse biomes were fascinating and really cool to see. The living quarters and expensive tour of the library, not so much. I...

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