Shangri-La is a fictional place in Tibet's Kunlun Mountains, described in the 1933 novel Lost Horizon by the British author James Hilton. Hilton portrays Shangri-La as a mystical, harmonious valley, gently guided from a lamasery, enclosed in the western end of the Kunlun Mountains. In the novel, the people who live in Shangri-La are almost immortal, living hundreds of years beyond the normal lifespan and only very slowly ageing in appearance.