Stunning 3.6 Acre Retreat with Underground Tunnel, Guest Apartment & Exceptional Upgrades. Welcome to 17490 G Dr. North in Marshall, a rare opportunity to own a beautifully updated home on 3.6 acres across two parcels, complete with a 65 foot underground tunnel you simply won't find anywhere else. This unforgettable property blends modern comfort, thoughtful design, and one of a kind features that set it apart from anything on the market. Step inside to discover gleaming hardwood floors, a bright and stylish updated kitchen with stainless steel countertops, stainless steel appliances, a center island with prep sink, tile backsplash, custom cabinetry, and open shelving. A walk in pantry and main floor laundry sit conveniently off the kitchen for everyday ease. The spacious primary suite feels like a private spa retreat, featuring a fully renovated bathroom with luxurious custom Onyx stone, a walk in shower with skylight, dual sinks, and an impressive walk in closet. The second full bathroom has also been remodeled with matching Onyx stone for a cohesive, upscale feel. Relax in the inviting family room with its cozy pellet stove, and enjoy peace of mind with major updates already done for you including a new roof, new windows, newer HVAC, and tankless water heaters. Outside, the property continues to impress with a new asphalt driveway and an attached two car garage featuring a beautiful new wood door. The true standout is the 36 by 40 heated lower garage, complete with an I beam and chain fall, ideal for hobbyists, mechanics, or storage. A spiral staircase leads to the fully finished 1,400 square foot entertainment space or guest apartment, complete with a full kitchen, full bathroom, and gas fireplace. Perfect for hosting, relaxing, or generating rental income. And then there is the feature everyone talks about, the 65 foot underground tunnel connecting the home's basement to the garage. Not only is it incredibly unique, but it also doubles as a tornado shelter, adding both character and practical safety. Beautif