Hi @hikoo! Welcome to New York.
I live in NYC and there are many great places to go in and around the city. Since you've done part of the Long Path, you can keep exploring different sections of it as day trips. The Harriman State Park section is especially nice (and intersects with the Appalachian Trail there as well). The Rockland Lake/Hook Mountain section is nice too with great views of the Hudson River. Check out our local grant partner New York-New Jersey Trail Conference for maps, directions, and volunteer opportunities.