I seem to recall reading an article a few years ago about a plan to open a park in New York, I think Manhattan, along what was once an elevated railway line.
What I can't remember was exactly where, or what it was called, so I can't check to see if it's open yet. Does anyone know if this park has been finished yet and is now open? And if so, how easy it is to visit (arriving by public transport, and likely leaving from a different bit), and what it's like?