round this time, it's usually mild outdoors, even pleasant for wandering around the city (not that it isn't during any other season, save for maybe a snowstorm in January), so long as you come prepared with a scarf and sweater when it's more chilly than usual, or for when sunset comes and afterward.
Willing wanderers will definitely have a field day in NYC on any good autumn day.
The Financial District in Lower Manhattan would be a good place to start. I'd begin my walk at the solemn National September 11 Memorial grounds amidst the flame-colored foliage of hundreds of swamp white oak trees, all glowing bright in the sun — soaking up the drowning sound and breathtaking sight of the largest man-made waterfalls in the United States rushing down into a pair of one-acre (4,000-square-meter) pools where once the Twin Towers stood. I'd take it all in as long as necessary, linger and enjoy a few moments of silence perhaps, maybe even say a prayer or two, then proceed west to Brookfield Place for more sightseeing, a cup of coffee, and some light bites.
There are numerous walking routes (too many to list here, in fact) that you can do on your own in New York City. They're all easy and manageable, and the fall season makes it even more delightful. Check out
to get started on mapping out your walks within the city with the help of whatever app that catches your fancy as your personal travel guide.
The grand Macy's Thanksgiving Parade also happens to take place during the autumn season, so you might want to add that to your future NYC Fall itinerary if you get around to it. Also, do check out