answer:Use the subway instead of taxis. You can get a subway map at almost all of the stations during the daytime from one of the people working behind the window. The map is very useful because it gives you subway and a map of the city. Probably you can see it on the web also, but good to have a real map in hand of the whole thing. I’ll look for the website. The Metropolitan Museum of Art is excellent if you like art, and it is a suggested price, you can offer any amount to enter. I suggest $5 minimum, simply because it is an amazing museum, and it does take money to maintain it. The terrace overlooking the park should be very nice this time of year. Also, I think the American Museum of Natural history is a suggested price, but the Planetarium and any other movies are likely to be fixed prices. Museum of Modern Art (MOMA) might have a free evening during the week? Not sure, check their website. Walking through central park is free. Also, I really like the ferry and going to Ellis Island and the Statue of Liberty. Grand Central is historic and free to just walk through, and there is a small annex to the transportation museum there, if it is still there, explaining the history of the subway, very interesting. It is free or very inexpensive. They mostly sell souvenours there.