Few places in Thailand are as multicultural as Sangkhlaburi (สังขละบุรี), with Karen, Mon and Burmese, plus a few Lao, together outnumbering the Thai. Most were born here, but many came across the Myanmar border looking for a safer, more stable life. There's also a small but prominent community of foreign NGO workers and volunteers.
As with many places at the end of the road, this is a great place to just hang out. Though it's a fairly remote, sleepy place, Sankhlaburi's recent popularity with Thai tourists means it's full of resorts and restaurants, the best of which look out over the mountain-girded Khao Laem Reservoir and the massive, enchanting wooden bridge that spans it.
Plus, the serpentine ride here, past jungle, floating villages and gorgeous lake views is itself reason enough to come.