Sure Sandi... it is a lovely .. if a bit naturalized growing area now... years ago as it was an elevated rail line... where the refrigerated box cars full of hanging cows.. sheep.. goats...pigs.. and what ever other animals were sent to NYC to be eaten ... the box cars went right into the refrigeated buildings and were unloaded... below workers carried animals on their sholders to trucks and other ground lever distributors... after it was closed decades later the rail lines had already overgrown with plants...nature made itgrow... so it was an easy idea to make it a park...
called the highline
there's a new one in the works called the lowline... a sub surface park... lit from above using a series of solar collectors... with light funneled below by fiber optics to arrays there to light the plants... it will be built in an old abandoned trolley station
http://www.thelowline.org/