The New York Pass is a ‘smart card’ - like a credit card with a computer chip inside - which allows you completely cash free entry to over 90 New York tourist attractions. Once you’ve bought your Pass you don’t have to pay to get into any of the attractions covered by the pass and the more sights you see, the more money you save.
Simply show the attendant at a New York Pass attraction your card, they will swipe it through a special machine and you will be allowed entry.
For a full list of attractions go here:
http://www.newyorkpass.com/attractions/