Extraordinary living and a rare opportunity await the discerning buyer at the prestigious Promenade, an amenity-rich luxury building in a premier Upper East Side locale! This unique offering presents 2 adjacent condominium units for sale - 21HJ (3 bed 3 bath) and 21K (1 bed 1 bath), which can be combined to create a fabulous 4 bedroom dream home, or kept as separate apartments. Li...