Urban planner Ryan Gravel shares the story of how his hometown of Atlanta, Georgia, rallied to build a massive urban park that will transform an abandoned railroad track into 22 miles of public green space called the Atlanta BeltLine. The places we live aren't inevitable, he says -- and if we want something different, we need to speak up. TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world's leading thinkers and doers give the talk of their lives in 18 minutes (or less). Look for talks on Technology, Entertainment and Design -- plus science, business, global issues, the arts and much more. Find closed captions and translated subtitles in many languages at www.ted.com/translate Follow TED news on Twitter: www.twitter.com/tednews Like TED on Facebook: www.facebook.com/TED Subscribe to our channel: www.youtube.com/user/TEDtalksDirector