Phnom Kulen is considered a holy mountain in Cambodia, of special religious significance to Hindus and Buddhists who come to the mountain in pilgrimage. It also has a major symbolic importance for Cambodians as the birthplace of the ancient Khmer Empire, for it was at Phnom Kulen that King Jayavarman II proclaimed independence from Java in 804 CE. Jayavarman II initiated the cult of the king, a Linga cult, in what is dated as 804 CE and declaring his independence from Java of whom the Khmer had been a vassalage state (whether this is actually "Java" or "Lava" (a Lao kingdom) is debated, as well as the legend that he was earlier held as a ransom of the kingdom in Java. See Higham's The Civilization of Angkor for more information about the debate). During the Angkorian era the relief was known as Mahendraparvata (the mountain of Great Indra).
Depart for Kulen mountain. The journey would take about 1hour and half to drive there