Biosphere 2 — Oracle, Arizona

Discover the Biosphere 2 Tour in Arizona

Step inside one of the world’s most ambitious scientific research facilities at Biosphere 2 in Oracle, Arizona. This massive glass-enclosed complex contains multiple fully functioning ecosystems under one roof, allowing visitors to walk through rainforest, ocean, desert, and savanna environments in a single visit. The experience blends immersive exploration with real-world environmental research focused on climate, sustainability, and Earth systems.

Why it’s special:
Biosphere 2 is unlike any other attraction in Arizona—or the world. It allows visitors to experience multiple ecosystems firsthand while learning how scientists study climate change, water cycles, and ecological balance inside a fully controlled environment built to mimic Earth itself.

History/Story of Biosphere 2

Biosphere 2 was constructed between 1987 and 1991 as an ambitious experiment to test whether humans could live in a completely closed ecological system. Initially designed to explore the possibility of sustaining life beyond Earth, it later transitioned into a world-class research and education center. Today, operated by the University of Arizona, Biosphere 2 supports groundbreaking studies in ecology, climate science, and environmental resilience while welcoming the public to learn from its history and ongoing research.

What You’ll See & Do on the Biosphere 2 Tour

• Walk through a full-scale tropical rainforest biome

• Explore a one-million-gallon research ocean with coral reef systems

• Experience desert and savanna ecosystems under glass

• Learn how ecosystems interact through interactive exhibits

• Discover the history of the original Biosphere missions and current research projects

Hands-On Elements: Immersive walk-through biomes and interactive educational displays.
Photo/Video Policy: Photography allowed throughout most indoor and outdoor areas; restricted zones are clearly marked.
Souvenirs & Extras: Science kits, educational books, sustainability gifts, and branded merchandise available in the on-site shop.

Pricing of Biosphere 2 Tour

• Adults (18–64): $29

• Seniors (65+): $27

• Youth (ages 5–17): $15

• Children under 5: Free

• University of Arizona Students/Faculty: $20

Practical Info for Visiting Biosphere 2

Duration: Approximately 90–120 minutes
Format: Self-guided walking tour with interpretive content
Schedule & Seasonality: Open year-round; advance tickets recommended
Working Hours: Daily 9:00 AM – 4:00 PM (closed Thanksgiving and Christmas)
Audience: Families, students, educators, science enthusiasts, and tourists
Accessibility: Most pathways accessible; some exhibits include stairs
Safety & Restrictions: Interior temperatures vary by biome; pace yourself
Languages: English
Group & School Visits: Educational group visits available with advance reservation
What to Bring/Wear: Comfortable walking shoes, water, light layers
Facilities: Restrooms, parking, café area, gift shop
Closures & Downtime: Closed on select major holidays

Nearby

• Oracle State Park

• Mount Lemmon Scenic Byway

• Tucson-area museums and desert attractions

FAQs About Visiting Biosphere 2

Do I need to buy tickets in advance?
Advance ticket purchase is recommended, especially during weekends and peak seasons.

How long should I plan to spend at Biosphere 2?
Most visitors spend between 1.5 and 2 hours exploring the biomes and exhibits.

Is Biosphere 2 suitable for young children?
Yes, children of all ages are welcome, and exhibits are designed to be engaging and educational.

Is the tour stroller and wheelchair friendly?
Most areas are accessible, though a few sections include stairs or uneven paths.

Can I take photos inside the biomes?
Yes, photography is allowed in most areas except clearly marked research zones.