Mashomack Preserve, Shelter Island
Tel: 631 749 1001
Concierge.com's insider take:
With over 2,000 acres of woodlands, salt marshes, and pristine coastline, the Nature Conservancy's Mashomack Preserve covers nearly a third of bucolic Shelter Island (take the car ferry to reach it). There are self-guided nature walks of various lengths, easy-to-follow maps, and the promise of a few hours of getting blissfully lost and forgetting all about the big city to the west.
Open daily 9 am to 5 pm, July and August only.