The highest hill in the area. Temple ruins similar to those found atop of Phnom Krom and Phnom Bakong can also be found on top of Phnom Bok. It lies 20 km to the north east of Siem Reap. Expect a tiring hike up the stairs. A guard may be able to show you around. Don't forget to check out the old howitzers from the civil war. Admission is free, no pass is needed for the Angkorian ruins.