I thoroughly enjoyed my one visit to the High Line in New York and I look forward to seeing the new section that recently opened:
Officially titled The High Line at the Rail Yards, this is the park’s third section, extending from West 30th to West 34th Streets, bounded by 10th and 12th Avenues on its east and west. With this extension, visitors are now able to explore the former elevated railway-turned-park in its entirety, from its southern end at Gansevoort Street, up to its new northern terminus at 34th Street — an impressive 22 blocks. The 10th Avenue Spur, incorporated into the Hudson Yards mega-development, remains unfinished and will open towards the end of 2015, in tandem with the 52-floor tower that will straddle it.
A few nice pictures here. Also, as this brief description hints, there is some interesting potential for interaction between the new parts of the park and nearby buildings.