320 Park Avenue, also known as the Mutual of America Building, is a 35-story office tower located in Midtown Manhattan's Plaza District. The property was originally completed in the early 1960s and later redeveloped by Mutual of America. The building contains approximately 760,000 square feet and features upgraded common areas, building infrastructure improvements, and tenant amenities. The property is situated on Park Avenue between East 50th and East 51st Streets with access to Grand Central Terminal, regional rail service, and multiple subway lines. The surrounding area includes office towers, hotels, retail establishments, financial institutions, and corporate headquarters.