DOUBLE HOUSE COMPOUND- SPANNING THE LENGTH OF A FULL CITY BLOCK-166 East 81st Street AND 179 East 80th Street. An extraordinary and truly rare property comprised of two magnificent 19th Century townhouses adjoined back-to-back through a private 74 ft. two-tiered landscaped garden with a swimming pool, encompassing 10,000 +/- square feet of living space just a few blocks from Central Park in Manhattans Upper East Side.                                                               .The Front House on East 81st Street contains four floors with five bedroomsincluding a master bedroom with en suite bath, fireplace and dressing room--four-and-a-half baths and three additional wood-burning fireplaces. All the original period details, such as crown moldings and hardwood floors, have been beautifully preserved. On the parlor floor, the elegant formal drawing room leads through to a beautifully-proportioned dining room with wood-burning fireplace and French doors leading to a balcony overlooking the garden. On the ground floor is a large CliveChristian kitchen with Viking and Sub-Zero appliances that is opened to a living area with a wood-burning fireplace. Finally, there is a finished basement with laundry room and full bath.The Back House on East 80th Street has been fancifully renovated to serve as a guesthouse and grand entertaining space. The large open living room with soaring 116 ceilings on the parlor floor has a custom designed bar and opens into a dramatic billiards room with wood-burning fireplace and through to a romantic covered loggia overlooking the pool and garden. The ground floor consists of an Italian tiled updated kitchen with Viking and Sub-Zero appliances, and a garden-side dining room that seats 20 guests comfortably. A beautifully appointed master bedroom-suite with wood-burning fireplace is accessible through its own separate entrance under the stoop on 80th Street.  In its current configuration, there are two more guestrooms on the third floor with a shared en suite bath.  On the fourth floor there is a ballet/yoga studio with wood-burning fireplace, a fitness room,  a sauna, a steam room and a full bath.  At the very top of the house sits an enchanting rooftop atrium with a wet bar and two terraces.  Both buildings have central air and state-of-the-art security systems with video surveillance.The magical 17 x 74 tiered garden has nearly 2,000 sq. ft of outdoor living space. It connects the two houses and has both northern and southern exposures. Its amenities include a grilling area and a heated outdoor pool equipped with Swim Jet.Truly, this exceptional compound offers the expansiveness and comfort of country living in the heart of the  Upper East Side. Its very rare to find this amount of space, privacy and beauty anywhere else in the city.