Experience Biosphere 2

New Tours

The Biosphere 2 tour experience has been redesigned to feature the cutting-edge science shaping the future of our planet. Come experience the remarkable Biosphere 2, which Time Life Books named one of the "50 Must-See Wonders of the World." Updated tours include our classic Under the Glass Tour, which takes you along a once-in-a-lifetime tour route of the 3+ acre research facility, where you will smell our ocean and feel a tropical rainforest up close.

Under the Glass Tour

Ages: All ages
When: Every day
Time: Throughout the day  (Ticket sales close 15 minutes before scheduled tour time)
Price: Included in General Admission Fee

The Under the Glass Tour experience perfect for visitors who truly want to explore this amazing facility, its intriguing history, and current scientific research. With your expert guide, you will enjoy the beautiful trail system as you wander through the Rainforest, walk across the Ocean overlook, explore the Coastal Fog Desert, and travel through the underground technosphere, descending into one of the amazing ‘lungs’ – an engineering marvel - that helped moderate air pressure in the sealed B2 environment. The Under the Glass Tour last a little over an hour and are offered on a first-come, first-served basis every day of the year except for Thanksgiving and Christmas. See Accessibility Guidelines.

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Family Tour 

Ages: All ages
When: Weekends/Holidays

Weekends & Holidays 11:15am & 1:15pm (Ticket sales close 15 minutes before scheduled tour time)

Price: Included in General Admission Fee

This condensed, interactive tour is perfect for a family visit to Biosphere 2. Designed for families with children 12 and under, this 60-minute guided tour follows the general tour route and concludes with an optional hands-on activity in our Ocean Gallery. The Family Tour is offered every Saturday and Sunday at 11:15am and 1:15pm. Regular admission prices apply.

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History Tour

Ages: All ages
When: Weekdays/Weekends

Weekdays 11am & 1pm & Weekends 10am, 12pm & 2pm  (Ticket sales close 15 minutes before scheduled tour time)

Price: $7 with General Admission Ticket - (Effective March 1, 2018)

This 45-minute outdoor tour gives you an in-depth look into what it was like to be a crew member inside of Biosphere 2. The guided tour also focuses on the design & construction of Biosphere 2 in the early 1990's. The tour is $20 per person or a $7 add-on to a general tour.

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Exclusive Specialty Tours - Space is Limited

General Information

Hours: 9:00 a.m. – 4:00 p.m. Please arrive no later than 3:45 p.m.

Biosphere 2 is located north of Tucson, Arizona at the base of the stunning Santa Catalina Mountains. This one-of-a-kind facility sits on a ridge at a cool elevation of nearly 4,000 feet and is surrounded by a magnificent natural desert preserve. See why visitors from around the globe journey here for this unique adventure not found anywhere else. Discover real-time research on the future of our planet as it unfolds in the world's largest earth science laboratory. Learn more about Biosphere 2.

Please note that pets are not allowed inside Biosphere 2 or on the grounds. Service pets that are trained to do specific tasks are welcome. Do not leave pets unattended in vehicles.