Spectacular wrap-around terraced penthouse with wide-open, unobstructed Central Park and reservoir views located in the very heart of the charming Upper East Side neighborhood, Carnegie Hill. This special apartment is on top of a handsome elegant pre-war NYC building - this "garden in the sky" features a private elevator landing that opens to a 25' living room with 9'8" ceilings - with knock out views of the ever-changing park, the mercurial water in the vast 105 acre Jackie Onassis Reservoir, and the dynamic cityscape beyond. You can open the terrace doors and windows and let in the fresh air, when it is winter - warm up next to the wood-burning fireplace and watch the snowflakes swirl and fall. The view at night is full of wonder - the night lights are like a pearl necklace gracefully outlining the contours of the Onassis reservoir walking path. You will have a front-and-center seat observing the night-fall all around this lovely penthouse - magnificent sunsets, the ever-changing path of the moon, the reflection of the twinkling lights upon the reservoir water.There are two wonderful terraces - one facing West towards Central Park, the other terrace facing East, bridged by the terrace walkway facing North. Multiple seating arrangements make these terraces perfect for glamorous entertaining and lovely, everyday outdoor living. Begin your day with the sun-rise in one of the three intimate planted terraces facing the East.The Penthouse floor features the West facing terrace, the spacious living room, 2-3 bedrooms, 3.5 bathrooms. An extra room, currently the Music Room (with terrace access) flows into yet another room - currently used as a sleeping/afternoon nap room. These two rooms can be used as a separate suite - a guest room, office or maid's room, with its own bathroom. The lower level has lovely Central Park views from all of the rooms - the private Master bedroom suite is serene and quiet - the walk-in closet could be used as a nursery; the smart wood paneled library has yet another wood-burning fireplace. Just off the formal dining room there is a welcoming windowed eat-in kitchen. Other details include central air, elevator access on both levels, a washer/dryer, steam shower, beautiful hardwood floors and an abundance of bookshelves and built-in storage.Built in 1927 by notable New York architect, George F. Pelham, 21 East 90th Street is a full-service building, on one of the prettiest streets in all of Manhattan. This historic block was selected by Andrew Carnegie because it is the high point of what is now known as Carnegie Hill. In 1898 Andrew Carnegie purchased the land, in 1902 he built his mansion. Carnegie's home and grassy gated garden were converted into a National Historic Landmark in 1966, the building is now the Cooper-Hewitt Museum a part of the Smithsonian Institution. Less than a block from your door-step, you will pass along the Carnegie garden - cross fashionable Fifth Avenue and find yourself at the majestic Engineers' Gate entrance which opens right into Central Park - enjoy strolling along the Onassis Reservoir, jogging, bike riding all through Central Park.Carnegie Hill is a beautiful neighborhood, marked by trees, charming shops and restaurants, and cultural institutions that include the Guggenheim Museum, the 92nd Street Y - the magnificent neo-Gothic Church of the Heavenly Rest across the street from the Carnegie mansion - the venerated Metropolitan Museum of Art is just a hop skip and jump down leafy Fifth Avenue. The Fifth Avenue bus stops right at 90th Street, the subway stops at Lexington at 86th and 96th Street. Welcome to the Penthouse at 21 East 90th Street, and to this lovely neighborhood!