Siem Reap. Beautiful, crawling with tourists (it wasn't high season when we went either) and really, really hot (about 40 degrees and very humid). It was difficult to keep from sweating on the paper. You just ooze at that temperature.
There are tons of kids selling tourist tat at Angkor Wat. They'd watch you draw, and forget to pester you for money for ten minutes. After we talked to them for a bit, I saw them drawing in the dirt with sticks.