The highlight of Mueang Sing Historical Park is an ancient castle built with Bayon-style Khmer architecture. which is thousands of years old It is considered an ancient city with Thai historical value. Suitable for traveling and studying history. See the most beautiful architecture and demonstrates past civilizations It is assumed that this city of Sing was built in the 18th and 19th centuries. There is only one castle structure facing east. This castle is unique in that the middle area of ​​the cloister is similar to an arch. When looking inside the castle, there were many valuable and long-lived sculptures.