Prachuap Khiri Khan (, ) is one of the western provinces (changwat) of Thailand. It is in the northern part of the Malay Peninsula, some south of Bangkok. Neighboring provinces include Phetchaburi to the north and Chumphon to the south. To the west, it borders Tanintharyi Region of Myanmar. Geography Prachuap Khiri Khan covers an area totaling . The province is on the Kra Isthmus, the narrow land bridge connecting the Malay Peninsula with mainland Asia. The province has the narrowest part of Thailand, just from the Gulf of Thailand to the border with Myanmar in the Tenasserim Hills. Geographically, Prachuap Khiri Khan is a moderate plain with elevations varying from sea level to . The maximum elevations are found in the northeastern and central west regions, which make up approximately 30 percent of the province. The total forest area is or 38.7 percent of provincial area. The long coast of the Gulf of Thailand has many sandy beaches. One of the best known, Hua Hin, has been a popular resort town since King Prajadhipok (Rama VII) built a summer palace there. From the coast the land quickly rises into the Tenasserim Hills, the mountain chain that forms the border with Myanmar. Due to its narrow watershed, the rivers in the province are all small. The only one of significance is the Pranburi River in the north. Among the smaller rivers is the Khlong Kui. Prachuap Khiri Khan has a dubbed as "Mueang Sam Ao", which meaning "city of three bays", refers to Ao Noi, Ao Prachup, and Ao Manao all three bays are lined up and are located in the area of Mueang Prachuap Khiri Khan District. Khao Sam Roi Yot National Park was established in 1966 to protect Thailand's largest freshwater marshes. The park contains some mangrove forests and mudflats. Most of the marshes were converted into shrimp farms, despite being in a national park. There are a total of six national parks, make up region 3 (Phetchaburi branch) of Thailand's protected areas. Kaeng Krachan National Park, Kui Buri National Park, Namtok Huai Yang National Park, Khao Sam Roi Yot National Park, Hat Wanakom National Park, Ao Siam National Park, There is Prince Chumphon North Park (upper) Wildlife Sanctuary, History The city of Muang Na Rang was reconstructed after it had been abandoned during the fall of the Ayutthaya Kingdom in 1767. The town was rebuilt at the