Chiang Saen introduction: Chiang Saen, located north of Chiang Rai, was once a small independent country and was later taken back by the King of Thailand. Historical relics such as the old city walls can still be seen here, and there are many pagodas and temples in the Chiang Saen style. Chiang Saen Museum (Chiang Saen Museum) is a branch of the National Museum of Thailand. It has small displays of Lang Na Thai style crafts and local ethnic minority costumes. Wat Chedi Luang was built in the 12th century. An 18-meter-high square pagoda remains in the temple. Chiang Saen Lake is located 4 kilometers southwest of the city, covering an area of ​​16,000 square meters, and can be used for rowing and water cycling activities.