Prime Approved 4.3 acre Building Lot located at the end of a quiet cul-de-sac off Montauk Avenue. Vistas of Stonington Harbor and Long Island Sound. 16 Bittersweet Way offers a rare opportunity to build a custom home in one of Stonington's most desirable locations-just minutes from Historic Downtown Mystic and the charm of Historic Stonington Borough. Enjoy World Class Boating just minutes away. This lot is to be serviced by Private Well and Private Septic, and A2 Survey is available. This approved building lot features a gently sloping landscape ideal for a walkout lower level overlooking more than 8 acres of protected woodlands. Framed by classic New England stone walls, the setting is both private and serene. With an approved septic plan for a 5-bedroom residence, no wetlands, and location well outside the flood zone, this property is ready for development. The expansive acreage provides ample space to create a true estate for generational living -whether envisioning a pool and guest house, sport court or pickleball, collector garages, gardens, or a studio retreat. Near Deep Water marinas, renowned dining, golf courses, scenic trails, and world-class coastal attractions, this exceptional parcel combines natural beauty, privacy, and convenience. At sunset, the landscape glows with reflected light through the trees; by night, the sky opens to peaceful stargazing-an ideal backdrop for your future home. A rare offering-one of the last undeveloped parcels in Stonington.