Commanding a position of unrivaled prestige on Long Island's legendary Gold Coast, this truly distinguished waterfront masterpiece reigns over 6.2 acres of ultra-private Nissequogue land. This rare, generational legacy property seamlessly fuses magnificent estate living with elite equestrian potential and extraordinary development flexibility, offering a potential 3+/- lot subdivision or the option to purchase an additional 4.02 acres of adjacent vacant land. Beyond the threshold of the estate, a breathtaking grand foyer introduces a main level of epic scale and architectural sophistication, where a stately living room anchored by a roaring fireplace, refined sitting room, private library, quiet home office, two sunrooms, and an expansive bonus room flow effortlessly into a culinary epicenter featuring an eat-in kitchen, breakfast area, pantry, and an elegant screened-in porch. The upper levels are a masterclass in private luxury, anchored by a regal master suite boasting a massive walk-in closet, four additional bedrooms gracefully configured into two dual-suite wings with shared full bathrooms, and a large lavish en-suite, bonus room, and an attic staircase that dramatically unveils an elevated sunroom terrace overlooking the sweeping panoramic view of the sound and estate grounds. Below, a connoisseur's basement level hosts a dedicated wine cellar, rare vintage fur vault, and an expansive laundry room, while a 3-car garage with a half bath sits beneath an ultra-private, 2-bedroom, 1-bathroom guest loft. Surrounding the magnificent manor, the breathtaking grounds open up into a resort-style paradise with majestic, mature landscaping, a sparkling pool with a dedicated pool house, charming garden house, and a classic greenhouse. While completely secluded within its own private sanctuary, this magnificent estate stands as a towering achievement of timeless luxury just mere minutes from the fairway at the exclusive Nissequogue Golf Club, pristine beaches, marinas, and the historic Knox Boarding School. An offering of this caliber is a rare privilege, destined for a discerning buyer ready to inherit one of the North Shore's most definitive luxury properties.