Located north of Tucson on Oracle Road/Highway 77 at mile marker 96.5. The center is an environmental research, teaching, and learning facility. Inside the 7,200,000 cubic foot glass and space frame structure, Biosphere 2 contains a tropical rain forest, savanna, marsh, desert, a million gallon salt water ocean complete with a coral reef, and a human habitat which now houses interactive exhibits. The 3/4 mile tour includes the Biosphere Theater, Demonstration Labs, Human Habitat, Climate and Earth Exhibit, Ocean Viewing Gallery, restaurants, and gift shop. A Technical Tour is available at additional charge by reservation only. A limited number of wheelchairs and strollers are available for rent. CALL for tour times. Admission fee with AAA, college student, military, and senior discounts available.