UNBEATABLE PRIVATE OASIS IN OLDE THORNHILL! Fall in love with this masterfully updated executive residence on a rare, breathtaking 100ft x 309ft deep multi-tiered ravine lot. Offering a true Muskoka-in-the-city lifestyle, it seamlessly combines a high-end custom layout with your own private campsite and cottage sanctuary.Pass through the Double Door Entry into a bright foyer with a main-floor office, hardwood floors, cathedral ceilings, and large skylights. The unique main level features 3 large bedrooms, each with its own modern private ensuite bathroom, plus a skylit guest bath. The secluded primary wing showcases an expansive bedroom with a Canopy Drop Ceiling, pot/track lighting, a sitting area, and a 5-piece ensuite. Its unmatched Luxury Walk-In Closet Room features custom cabinetry, an electric fireplace, a chandelier, a vanity, a sitting space, and a dedicated walk-out balcony overlooking the ravine. The backyard layout features 3 structural decks across three distinct functional tiers: (i) The Upper Entertaining Tier has a covered dining deck and an open family room deck with stairs to the pool. (ii) The Pool & Patio Tier offers a custom patio surrounding a heated concrete inground pool and a pool house pavilion equipped with an outdoor kitchen, bathroom, pool equipment, and storage. (iii) An outdoor staircase leads down to a vast, level lower lot brimming with endless potential, making it ideal for a custom private campsite, fire pit, playground, or treehouse. The bright Walk-Out Basement with laminate flooring and direct pool access is ideal for multi-generational families or guest hosting, boasting a large rec room with an electric fireplace, 3 bedrooms, a full bathroom, and extensive storage. The landscaped front yard provides a circular driveway for up to 11 vehicles, a basketball hoop, and a multi-car garage. Steps to top schools and elite golf courses (The Thornhill Club and Toronto Ladies' Golf Club)!