Communal gardens, landscaped rooftops, and wide-open windows aren't features of your typical hospital—but maybe they should be. Khoo Teck Puat Hospital in Singapore is a case study in what can happen when a nature-inspired design is applied to the medical setting to promote healing. The hospital, which opened its doors in 2010 and now serves 800,000 residents in northern Singapore, has masked the smell of medicine and chemicals with over 700 species of fragrant native plants. In the lobby…