First time ever offered, this extraordinary open-water estate commands a premier position on Duck Key overlooking the crystal-clear waters of Tom's Harbor and iconic bridge. Spanning two expansive lots with an impressive 152 feet of water frontage, this iconic residence—designed by renowned architect Dale Baldwin—delivers rare scale, privacy, and timeless Florida Keys elegance. A dramatic double-door entrance opens to a light-filled open floor plan defined by white-washed vaulted and tray ceilings, walls of windows, and sweeping harbor views. The chef's kitchen features black granite countertops, a statement island, butler's pantry, and premium appliances including Thermador double ovens, Jenn-Air cooktop with grill, Whirlpool French-door refrigerator, and GE trash compactor. A formal dining space for twelve, pass-through bar and billiards area, and spacious living zones create an exceptional environment for elevated entertaining overlooking the water. The oversized primary suite offers a private waterfront retreat with spa-inspired bath, expansive walk-in closet, and balcony overlooking open water. All bedrooms enjoy private balconies. Additional highlights include abundant storage, interior stairways, laundry room, white ceramic tile floors, and plush carpeted bedrooms. Outdoors, a screened balcony, resort-style pool with paver deck, and mature tropical landscaping frame the ultimate island lifestyle. The expansive T-dock provides outstanding versatility for a boat lift, jet ski lift, and kayak launch. Built with solid concrete construction, standing-seam metal roof, accordion shutters, subfloor access, two-car garage, and a grand half-circular driveway. A landmark offering where architectural distinction meets open-water serenity on prestigious Duck Key.