The Phnom Kulen National Park (Khmer: ឧទ្យានជាតិភ្នំគូលែន) is a national park in Cambodia, located in the Phnom Kulen mountain massif in Siem Reap Province. It was established in 1993 and covers 373.76 km2 (144.31 sq mi). Its official name is Jayavarman-Norodom Phnom Kulen National Park (Khmer: ឧទ្យានជាតិព្រះជ័យវរ្ម័ន-នរោត្តម ភ្នំគូលែន).
During the Khmer Empire the area was known as Mahendraparvata (the mountain of Great Indra) and was the place where King Jayavarman II had himself declared chakravartin (King of Kings), an act which is considered the foundation of the empire.
Phnom Kulen National Park is located in Svay Leu District about 48 kilometres (30 mi) from the provincial town of Siem Reap and about 25 kilometres (16 mi) from Prasat Banteay Srey via Charles De Gaulle Road. There are several nature features, historical places, and other sights making Kulen National Park an interesting place to visit.
Chup Preah (Khmer: ជប់ព្រះ) is a valley featuring several statues made during the 16th century.
The Kbal Spean archaeological site, also known as "Valley of a thousand Lingas" (Khmer: លិង្គ១០០០), is located on the mountain, along the Kbal Spean River, which is a tributary of Siem Reap River. The site has many figures of Yoni and Linga as well as other figures carved into the rocks of the riverbed and banks which may become fully exposed in the dry season when the river dries up. The river is shallow and small waterfalls form at the site in the wet season. The site is accessible by trekking uphill through a 1.5 kilometres (0.93 mi) jungle track from the parking site.
Terrace of Sdach Kamlung (Khmer: ព្រះលានស្តេចគំលង់) is a plain terrace with a small ruined temple made of bricks in the middle. The terrace was once covered with lava.
