In my post about the farms you can visit in Westchester, I mentioned that it is easy to get to Philipsburg Manor and Stone Barn Farms without a car, using public transportation. I thought it would be cool to write about some of the other day tips you can take from NYC using public transportation. There's really no reason to be stuck in the city just because you're car-less (or want to save your gas money on, say, the down payment on an apartment). There are plenty of fun family day trips that can be easily accessed using Metro-North trains or busses.
The MTA actually has an entire section of their website dedicated to what they so romantically dub MTA Getaways . You've probably seen this advertised in the subway, but I know I never really looked into it before. Many of the trips you could do any time, but the MTA has also worked with local tours and groups to create specific event packages.
Here are some car-free day trips that are definitely worth a try: