If you’re in NYC for a day, one place I suggest you check out is the Top of the Rock. The Top of the Rock Observation Decks are located at the top of the Rockefeller Center on 50th Street in between 5th and 6th Avenues.
The Top of the Rock gives you the most breathtaking views of the city. You can spend as long as you want up there getting lost in the city.
For more information, visit Top of the Rock’s Welcome Page.