Words can not describe Cambodia adequately. Angkor Wat is every bit as wonderful as you imagine it to be. But there are so many different temples at Angkor that you will be pretty much templed-out after a couple of days and then when you decide to move on without having seen all 756 temples at all different times of the day, pretentious nobs called Tarquin and Orlando will chunder with disgust.
Phnom Penh - get there before it gets spoilt!!!
I loved the floating Caltex gas station on Ton Le Sap