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 now allows visitors to tour the interior of the facility. This fascinating, family-friendly experience is guided by a tour app and takes about 1 hour and 15 minutes to complete. Download the tour app prior to arrival. Tickets must be purchased online. Open daily from 9:00 AM to 4:00 PM. Masks are mandatory.