Hidden beside Yangzonghai Lake in Kunming is a century-old narrow-gauge railway that is no longer in use

There is a plateau lake in Kunming that is loved by tourists for its beautiful environment, but on Matou Mountain above this lake, there is a narrow-gauge railway built 100 years ago that few people know about. This is the Yunnan-Vietnam Railway. The Yunnan-Vietnam Railway is a railway in Southeast Asia connecting Kunming, China, and Haiphong Port, Vietnam. It is the first railway in Southwest China, a narrow-gauge railway running north to south. The Yunnan-Vietnam Railway was called the world's third-largest engineering project, comparable to the Suez Canal and the Panama Canal, by The Daily Telegraph. If you like, you can come and see it when visiting Yangzonghai Lake.