Since business and pleasure may take us to New York City from time to time, the good mountaineer should know the resources.

I find that Manhattan can be a refreshing break from the endless solitude and loneliness of the western side of the continent. Just walking the streets requires a high level of alertness similar to climbing a 5.5 and driving in mid town can be like 5.10b!

There are some fine high points such as the Empire State Building or the Rockefeller Center Observation Deck. Both cost $25 to access but offer some great exposure.
Once you get your fill of the glory of urban landscape, Central Park offers a pleasant escape.
The bedrock of Manhattan consists of some very solid gneiss.
A walk in Central park should be done in some good sticky approach shoes to take advantage of the many 2-3 move boulder problems that abound.
For some more serious bouldering Cat Rock and Rat Rock in the southern part of the park offer the opportunity for a good gymnastic work out.
The many exposed rock outcroppings of Central Park show obvious signs of glacial erosion that constantly remind me of the Yosemite high country.
To think that some 40,000 or so years ago the winters grew longer and longer until the snow never even melted during the summer months but built up year after year. Hundreds, thousands of years passed until the snow became deep ice, crushing and scouring the land. The geologist teaches it has happened several times in the past, thus it shall happen again, several times, in the future. This is what I like to ponder while wandering central park.
I hope this has been of interest. Please add your Central Park beta to this thread.
More available on MountainProject.com
http://mountainproject.com/v/central-park/106044536