Did a boat trip out on the lake in 2000 before Amansara was open. You go past floating Vietnamese villages and see these peoples daily life. I think Amansara offers a visit to the Angkor Conservatory (think that's the name) which holds many of the missing pieces of the temples. It has all the missing pieces grouped together ( ie all arms, all heads, etc.). Don't miss a sunrise tour to Angkor Wat which in 2000 you went out front of Raffles and jumped on the back of a motorcycle for $2 USD. Also with the meal plan at Amansara you have the choice of eating one meal off property and I remember Siem Reap having a great vibe and good food.