On the north side of the lake are the four Greenbelt housing cabins,[A 15] and the Cliffs Cottage. This 34,000-square-foot (3,200 m2) "green" building designed by Scott Johnston is solar-powered using two panels,[D 8] and features geothermal heating.[B 2] Cliffs Cottage was the first sustainable showcase home for Southern Living magazine, which featured it in the article Our Most Innovative House Ever, detailing how to create a house that requires less energy and generates power.[D 8] The cottage now serves as home for the David E. Shi Center for Sustainability.