Phetchaburi (, ) or Phet Buri () is one of the western or central provinces (changwat) of Thailand. Neighboring provinces are (from north clockwise) Ratchaburi, Samut Songkhram, and Prachuap Khiri Khan. In the west it borders the Tanintharyi Division of Myanmar. Phetchaburi is home to Kaeng Krachan National Park. Geography Phetchaburi is at the north end of the Malay Peninsula, with the Gulf of Thailand to the east and the Tanaosi mountain range forming the boundary to Myanmar. Except for these border mountains most of the province is a flat plain. With an area of Kaeng Krachan National Park is Thailand's largest national park, covering nearly half of the province. It protects mostly rain forests in the mountains along the boundary to Myanmar, but also the Kaeng Krachan Reservoir is part of the park. The total forest area is or 57.7 percent of provincial area. The only significant river of the province is the Phetchaburi River. History Originally, Phetchaburi was known as "Pipeli" (พลิพลี), or "Pribpri" (พริบพรี) as it used to be one of the southern kingdoms in Thai history alike to Tambralinga. Its name was recorded in De la Louère's memo during the reign of King Narai in the middle of the Ayutthaya period. In 1860 King Rama IV built a palace near the city of Phetchaburi, commonly known as Khao Wang, but its official name is Phra Nakhon Khiri. Next to the palace the king built a tower for his astronomical observations. On the adjoining hill is the royal temple Wat Phra Kaeo. Symbols The provincial seal shows the Khao Wang palace in the background. In front are rice fields bordered by two coconut palm trees, symbolizing the major crops in the province. The provincial tree is Eugenia cumini. Thai mahseer (Tor tambroides) is a provincial fish that is delicious and used to be found in the Phetchaburi River. Environment Phetchaburi's shoreline on the Inner Gulf of Thailand in the area of Pak Thale consists of salt pans, mudflats, mangroves, and sand spits. It has been termed, "...the premier bird watching site for shorebirds in Thailand,..." The 123-acre site provides sustenance for both passage and wintering species, as well as residents. The area hosts more than 7,000 waterbirds during the northern hemisphere winter. Economic development of the tidal flats, compounded by the impacts of climate change, threaten this ecosystem's future. Several regular visitors are under threat, including the