I knew about the Biosphere a few months before they opened their facilities to the public as an environmental museum. The giant sphere, located in a beautiful natural environment, St. Helena Island, was a former World's Fair pavilion (Montreal, 1967). The sphere was designed by the architect/engineer Buckminster Fuller, famous for his geodesic domes. It worked for many years as a purifying and research center related to water. Currently the Museum is free for children under 17 years. It is open from Tuesday to Sunday from 10:00 to 18:00.