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Visit UA Biosphere 2
ARIZONA
On 3 lists and 2 people have done it.
Biosphere 2
Biosphere 2 is a 3.15-acre (12,700 m) structure originally built to be an artificial, materially-closed ecological system in Oracle, Arizona by Space Biosphere Ventures, a joint venture whose principal officers were John P. Allen, inventor and Executive Director, and Margret Augustine, CEO.
This description uses material from the Wikipedia article on Biosphere 2 and is licensed under the Creative Commons Attribution-ShareAlike License (view authors).
