Do | $$$$$
When it comes to outdoor fun, Hudson River Park's Pier 25 is a perfect 10. Head over and you'll find a seasonal 18-hole mini golf course, sand volleyball courts, a 25,000-square-foot gated children's playground, and an artificial turf lawn. A snack bar makes it easy to refuel. For seafaring types there's also a dock and moorings—you might even spot historic ships.