The first highest mountain Where I recommend to visit in Cambodia is Bokor Highland Resort . I don’t remember how high is it but it around 1145 maters and spend around 2 hours drive by car from Phnom Penh to Kompot and spend around 40 mn to drive up to the top of mountain. It made me get car sick of two time visit there coz I am the best fan of car sick …! It has very beauty cloud along the road and also has many old building since France colonize in Cambodia . Casino, hotel, restaurant resort, pagoda, water fall and forest view are attractive things of there. Try it and you will know !!!