Shangri-la City is a fictional city often mentioned in the works of British author James Hilton. It was first introduced in his 1933 novel "Lost Horizon." According to Hilton, Shangri-la is a hidden utopian valley in the Himalayas, characterized by beautiful landscapes, pleasant climate, and prolonged lifespans. In the book, it serves as a sanctuary for a group of Westerners who stumble upon the city and find eternal happiness and peace there. The concept of Shangri-la has since become synonymous with a mythical paradise or an ideal place of contentment and tranquility.