Gaze up and take in Chanin Building, one of the most attention-grabbing buildings in the area. See if it's possible to go to the top and view the world from way up high.
You'll be spoiled for sightseeing choice in Manhattan. Chanin Building is a good place to start here, but there are lots of other worthy places to explore. Times Square, Statue of Liberty, and Broadway are close to the architectural wonder and and will cap off your day nicely.