161 Saint Marks Ln Islip, NY, 11751 "Rare And Exclusive" Historic So. Shore Waterfront Estate, Located On 5.7 Acres On Champlin Creek, Adjacent To The Seatuck Preserve. This Old World Estate Boosts ~ 6500 Sq Ft. Main House ~ Guest House W/2 Brms, Kit & 1.5 Baths~ Pool House W/ Kit & Bath ~ Brick House W/ Bath, Heat & Air ~6 Stall Horse Barn ~8 Car Garage~200 Ft Bulkhead W/ Boat Ramp & Dock, Please See Tour!