Penthouse living with ocean and canal views, a private garage, and your own boat slip with a 10,000-lb lift--welcome to Treasure Cay in Marathon's Coco Plum neighborhood. This beautifully maintained top-floor corner residence offers exceptional natural light, added privacy, and convenient elevator access. Offered furnished with specified exclusions, it's ready for you to settle in and enjoy the Keys. The bright, open living and dining areas extend onto screened waterfront balconies, creating an inviting setting for morning coffee, outdoor dining, and watching boats pass below. The kitchen combines ocean views with granite countertops, solid maple cabinetry, stainless steel appliances, breakfast-bar seating, and a touch-activated faucet. Tile flooring and impact-resistant windows and sliding glass doors continue throughout, complemented by electronic blinds on all sliding glass doors and plantation shutters on the kitchen and office windows. The spacious primary suite features canal views, direct balcony access, dual closets, and an en-suite bath with quartz countertops and solid maple cabinetry. All bedroom closets feature custom built-in cabinetry, and solid maple cabinetry extends to both bathrooms. A guest bedroom, second full bathroom, and separate office provide comfortable space for visitors and working from home. Boaters will appreciate the included slip and lift on an approximately 200-foot-wide canal, offering deep-water access and ample maneuvering room. Beautifully landscaped grounds surround the waterfront pool, heated and chilled for year-round enjoyment, and hot tub. Tennis, pickleball, a clubhouse, and plentiful guest parking add to the community's appeal. Nearby bike paths provide a convenient route to Coco Plum Beach. With its elevated corner position, expansive views, and private outdoor living spaces, this Treasure Cay penthouse offers a distinctive waterfront retreat.