This stunning triplex penthouse boasts a prime Park Avenue location, multiple terraces with views across Manhattan and Central Park, and a floor-to-ceiling glass solarium surrounded by outdoor space. Enter the apartment on the penthouse floor of 605 Park Avenue, a 105-unit building designed by Sylvan Bien in 1954. This main level is the epitome of classic living space with a wraparound terrace offering outdoor space to seven rooms. The living room boasts access to an additional private terrace, a tranquil spot with lush greenery and skyline views. The living room, on the west wing of the apartment, is joined by a library, dining room, and a spacious modern kitchen. The east wing holds the expansive primary bedroom suite, which includes a large dressing room and marble-lined bathroom. Floor-to-ceiling glass doors in the primary bedroom open to a terrace large enough for two to enjoy their morning coffee. Adjacent to the bedroom are a sitting room with an en-suite bathroom and office. An elegant curving staircase brings you down to a modern entertainment room with an attached wet bar, the second of two kitchens in the residence, and two guest bedrooms. The apartment's crown jewel can be found on the building's roof. A floor-to-ceiling glass solarium with marble flooring offers additional entertaining space with a wet bar and terraces on either side. The sliding doors can be both opened and stacked to provide an incredible open-air space ideal for dining and entertaining. The solarium offers a unique amenity in an apartment with the grandeur of a historic Upper East Side cooperative in a more modern building. Brand new windows and doors were installed throughout the home in the summer of 2021. 605 Park Avenue is a full service white glove building that was converted to a cooperative in 1981. The building features a newly-renovated lobby, doorman, live-in resident manager, attended elevator, bike room, laundry room, landscaped outdoor space and a new fitness center. The exterior of the building, one of the finest white brick apartment houses in New York City, was renovated in 2021.