Without a doubt the most glamorous Penthouse on the Upper East Side, this magical residence is an absolute dream for a terrace lover. Boasting over 2,000 sqft of outdoor space with huge north and south facing terraces, and featuring open city and skyline views, the absolute WOW factor of the Westbury's celebrated top floor aerie is not to be underestimated. The duplex is accessed via a large private elevator landing. Entry is into a double height Gallery that is graced with an absolutely gorgeous marble clad staircase with a cast iron and bronze bannister, a pietra dura marble floor and glimpses of the beautifully planted wrap around terrace. The immense and fabulous wood paneled Living Room features three glorious and open exposures, as well as boasting a wood burning fireplace that is flanked by French doors onto a huge pastoral south terrace. There is also a wonderfully cozy Library, and a pretty Office with full bath, that can easily function as a fourth bedroom. Flooded with light the superbly equipped chef's Kitchen is an absolute joy and is conveniently open to an informal Dining Room. Beyond there is yet another remarkable terrace and a marvelous Solarium Conservatory. The downstairs layout is completed by a Guest and a Staff Powder Room, a private elevator, and a large Pantry with abundant storage. The Second Floor is distinguished by an absolutely extraordinary 2,000 sqft Master Suite that is comprised of an enormous Bedroom with a wood burning fireplace and endless southern skyline views. Then there are two Dressing Room suites, both with large marble clad bathrooms and tremendous closets. Beyond there are two Guest Bedrooms, both with en suite baths and very ample closets. The entire upstairs is flooded with light throughout the day and sparkles at night thanks to the dazzling twinkling light views that are on 360 degree display. Building amenities include a full time concierge and doorman, gym, and bicycle room. Plus the apartment is offered with a double sized storage unit and a wine cellar.