Minnewaska State Park NY.
Great place, got all these old carriage roads from the time when it was a top notch destination for the minted who'd be driven on horses drawn, erm, carriages to the waterfalls, cliff tops etc. Sound place, about 90 miles north of NY City. Kids love it. Walks of various length and difficulty. Apparentley there's a ton of rattlers but I don't know anyone who's ever seen a live one. Tea time, drive back through New Paltz, which is a pretty cool little spot , plenty of decent resturants and have a bite to eat. Drive home kids knackered but happy,