The High Line Park uses the disused southern portion of the West Side Line running to the Lower West Side of Manhattan. It runs from Gansevoort Street – three blocks below 14th Street – in the Meatpacking District, through Chelsea, to the northern edge of the West Side Yard on 34th Street near the Javits Convention Center. An unopened spur extends above 30th Street to Tenth Avenue. Formerly, the West Side Line went as far south as a railroad terminal to Spring Street just north of Canal Street, however, most of the lower section was demolished in 1960, with another small portion of the lower section being demolished in 1991.

Re-purposing of the railway into an urban park began construction in 2006, with the first phase opening in 2009, and the second phase opening in 2011. The third and final phase officially opened to the public on September 21, 2014.A short stub above Tenth Avenue and 30th Street, is still closed as of September 2014, but will open by 2015. The project has spurred real estate development in the neighborhoods that lie along the line. As of September 2014, the park gets nearly 5 million visitors annually.

Complete documentation of the project can also be seen in this video: