Jane Jacobs would be proud. The High Line is a rare case of concerned citizens, City officials and developers working together on an urban-renewal project that satisfies all parties involved. The elevated park, built on a railway trestle that had been abandoned for 30 years, is a sliver of green that looks out onto the stark landscape of Manhattan's west side. Designed by landscape-architecture firm James Corner Field Operations and the architects at Diller Scofidio & Renfro, the renovation mimics the way nature had begun to overtake the park before it was saved from demolition by two friends who lived in the neighborhood. Section 2 of the High Line opened to the public on June 8, 2011, adding 10 blocks north of its original West 20th Street border. September 21, 2014 marks the opening of the third and northernmost section of the park, the High Line at the Rail Yards. With this third addition, the High Line now runs from Gansevoort Street north to West 34th Street, between Tenth and Twelfth Avenues.