The leaves of a dense deciduous canopy rustle in the coastal breeze at this tranquil retreat near Bridgehampton and Sag Harbor. Breathe it all in from the hot tub or pool set into vast lawn, then grill on the deck before a night around the fireplace or ping pong table. French doors let the outside in, and the master suite opens to its own balcony and bistro set. Sagg Main Beach is a 5-minute drive.