When we booked our trip to Italy our package left from JFK airport in NYC. Since Little Man hadn't been there before we decided to take a later flight back home from NY in order to have some time the next day to see a sight or two. We slept in and had breakfast at our hotel not far from the airport and then took a shuttle to the subway station nearby.
Little Man took the subway for the first time. Unfortunately there was maintenance being done so we took it,had to get off and take a bus and then get back on which made the ride take longer than it should have and I think it killed it for him a bit.
We visited the 9/11 Memorial. I had visited the site of the World Trade Center towers not long after the attack, when there was a gaping hole in the earth surrounded by rubble. To see a beautiful memorial in its place was moving.
Afterwards, we walked around a bit, and plan to go back to visit when Little Man can better see New York City, when we have time to show it to him properly.