Phnom Bok is a 9th-century mountain temple perched atop a 235-meter hill, the least visited of the three hilltop temples built by King Yasovarman I. Constructed around 910 CE, it features three sandstone and brick towers dedicated to the Hindu Trimurti: Brahma, Vishnu, and Shiva. The ascent requires climbing 650 steps through the forest, giving it an adventurous and secluded atmosphere. Unlike crowded Phnom Bakheng, you rarely see other tourists here. The site also houses an active Buddhist monastery with beautiful murals and colorful tiled floors, representing the living religious tradition alongside ancient ruins. Views from the summit encompass the East Baray reservoir and the expansive Cambodian countryside. This off-the-beaten-path destination rewards those willing to make the climb with peaceful solitude and authentic temple exploration without the crowds.