Our first truly ghostly stop is the NYC Public Library. Here you can attend a "Now That You're Dead" seminar, meet the writers of old books, and acquire the unofficial guide to the New York Underworld. The rules for ghosts are no flying over water and no staying out past dawn. Rules for the living are no eating or drinking and you can only stay for 3 days and 3 nights.
Photo credit:https://upload.wikimedia.org/wikipedia/commons/0/02/NYC_Public_Library_Research_Room_Jan_2006.jpg