One of the most iconic buildings of the past decade, Bosco Vertical, completed in 2014 in Milan, Italy, is often used as inspiring images of the sustainable green building movement, due to its pioneering integration of a 44-story vertical forest across two towers. It is a pair of high-rise residential towers that reach a height of more than 140 meters, and contain more than 900 trees spread over 8900 square meters of outdoor terraces!