301 Park Avenue

It's where the Waldorf salad was invented; it was the first hotel to offer room service; and it has its own railway platform to Grand Central, large enough to fit FDR's car. The historic tidbits about the Waldorf Astoria are plenty, but now the world-famous hotel is making big changes to its future. Hilton Worldwide Holdings, who has officially owned the Art Deco landmark since 1972, has agreed to sell the 1,232-room hotel to the Anbang Insurance Group Co., a financial and insurance company based in Beijing, for $1.95 billion. Hilton, the world's largest publicly traded hotel operator, will continue to manage the property under a "strategic partnership."
More on the plans here