One of the most clean and calm countries in southeast Asia for tourism is Laos. Because of an influx of westerners visiting this area of the world, the Laos government made it a priority to make the country appealing to outsiders.
From the Talat Sao morning market to the That Luang Buddhist monument, there is a lot to do and see here. Laos is tucked in between Thailand, Vietnam, and Cambodia, so the classic mountain and jungle ranges all meld together here. Those who are eco-conscience will be happy as the country does a good job of supporting tourism in a sustainable way.
One thing Laos is known for is having the tallest treehouse in the entire world. There is also Luang Prabang and Phong Nha, two UNESCO World Heritage Sites in the country. If you want a full local experience, go for Boun Pi Mai, which is the Lao New Year. This is where you can engage in the nightlife and have some delicious food