Bayon is a beautifully eerie place. The temple is huge, but it's halls and rooms are constricting. Scrambling up stairways you run into huge faces 1.5 times your size staring at you. As you walk past, you look back to make sure the eyes aren't following you.
Thinking of the time and labor required to build these temples is mind-paralyzing. The scale of them and shear number of them spotting the countryside are amazing. Why did they only teach us about the pyramids in school?