In New York, they say that when people know about something it isn’t cool anymore.
Such can be said about The High Line, which opened in 2009: while out-of-towners (yours truly included) stroll with wide eyes and babyccinos from Chelsea Market along this mile-long playground above the streets, ask a local and they will likely tell you that it is so four years ago.
On a related note, Banksy is currently running a 5-day installation under the High Line with a $50,000 security price tag. Does he not trust tourists? ;)