This ambitious public infrastructure project boasts furnaces and turbines that convert 440,000 tons of waste into clean energy each year—enough to provide 150,000 homes with electricity and heating. All of this is held beneath the 107,639-square-foot green roof (which absorbs heat, removes air particles, and minimizes stormwater runoff). This biodiverse landscape doubles as a sporty architectural rooftop with 96,875 square feet of artificial ski terrain—the same length as an Olympic half-pipe. Visitors can reach this dynamic roof, which also includes slopes for beginning skiers and freestylers, by ascending on either a platter lift or a glass elevator—both of which run alongside the gilded, 24-hour plant within.Evan Nicole Brown (Fast Company)