The 14,500-square-foot Calistoga clubhouse provides St. Helena and Calistoga children with a comprehensive indoor/outdoor year-round educational experience. Doug Thornley, with Gould Evans Architects, said biophilic design elements throughout the clubhouse reduce stress, enhance creativity, and improve clarity of thought and well-being. The single-story building has two wings organized around an interior “games room.” The exterior covering is a composite glass fiber-reinforced concrete material, called “öko skin”, which never needs painting or cleaning.