5. The Waldorf Astoria Hotel

Waldorf Astoria Hotel-Art Deco Mailbox-NYC-001Image via Art Deco Mailboxes

The Waldorf Astoria has four mailboxes in the lobby, designed by architects. Other unique details to spot in the hotel lobby include Cole Porter’s piano, a clock from the Chicago World Fair (with a small Statue of Liberty on top), and a 148,000 piece mosaic, lost under carpeting for many years. Find out more in our Top 15 Secrets of the Waldorf Astoria Hotel.