Biosphere 2 is a world-famous research facility operated by the University of Arizona, located near Oracle in eastern Pinal County. The Biosphere 2 Experience allows guests to follow a one-way path around the exterior and portions of the interior of Biosphere 2. This fascinating, family-friendly experience is guided by a tour app and takes about 1 hour and 15 minutes to complete. Please download the free app prior to arrival.