A friend spoke highly of the High Line, and I decided walking the trail would be a good way to spend a morning in Manhattan before heading to Baltimore by train in the afternoon. It was a beautiful walk on an end-of-summer day – quiet in a city not noted for quiet, secluded in parts, with views of the Hudson River and Chelsea in other parts. Very pleasant, very relaxing. The southern end of the trail is next to the Whitney Museum – if you have the time (alas, I did not), you can combine the High Line with a visit to the museum.
From Wikipedia (https://en.wikipedia.org/wiki/High_Line): The High Line is a 1.45-mile-long (2.33 km) elevated linear park, greenway and rail trail created on a former New York Central Railroad spur on the west side of Manhattan in New York City. … The abandoned spur has been redesigned as a “living system” drawing from multiple disciplines which include landscape architecture, urban design, and ecology. The High Line was inspired by the 4.7 km (2.9 mi) long Promenade plantée (tree-lined walkway), a similar project in Paris completed in 1993.