One Flew Over The Cuckoo’s Nest is set in a mental hospital in Oregon. The novel is divided into four parts. Parts One, Two and Four are set in the hospital itself. In Part Three, the patients from the hospital go on a deep-sea fishing trip, and the setting is the boat. Except for a few outsiders, the characters are either patients or employees of the hospital. Kesey has drawn from his own experience to give the reader an insider’s view of the hospital.