You can always go sight-seeing in NYC no matter what time or season it is.
Travel Activity Tip: Night time ice-skating at either Central Park’s Wollman Rink or Rockefeller Center.
Central Park at Night
Essex House, NYC
Sleepy Tree in Central Park, NYC
St. Patrick's Cathedral feeling Patriotic
Rockefeller Center - Statue of Prometheus. I always wondered what the name of this statue was.