Luang Prabang, Laos

This UNESCO World Heritage Site is the former capital of Laos, and you'll see everything from golden-roofed temples to vestiges of colonial French architecture here. Buddhist monasteries abound in Luang Prabang, and early every morning, monks process through the streets collecting alms (their food for the day). If you want to watch or participate, though, ask your hotel for a brief etiquette lesson first—you have to distribute the food in a specific manner.