Ian Somerhalder is known primarily for his steely blue gaze and starring role in The Vampire Diaries, but did you know that the star is also a passionate environmental activist? In 2010, Somerhalder launched the Ian Somerhalder Foundation (ISF), which empowers young people to start environmental projects—which is why we’ve named him one of this year’s Conde Nast Traveler Visionaries. He talks more about his foundation in the video.