On our trip to Vietnam we spent a couple of days in Cambodia. We went to Siem Reap and stayed in a fabulous little place called Journey's Within (about 7 minutes outside the town by tuk tuk). It was cheap by Irish Standards and I cannot fault their service in any way. The staff were super friendly and very very helpful. The bungalows are lovely, with free soft drinks and DVDs. You cannot go wrong!
From here we made our way to Angkor Wat to see lots and lots of temples. Angkor Wat itself is pictured and it is impressive from the outside and less so on the inside.