For the ultimate in luxury and name recognition, royals have been staying at the Waldorf-Astoria in midtown Manhattan for years. Both Princess Margaret and the Queen herself have stayed at the hotel, as have international royalty from Monaco, Jordan, Japan, and more. For several years during the 1940s and '50s, the duke and duchess of Windsor kept apartments at the hotel as well, keeping it as their New York residence while they shuttled to other locales in America and Europe.