Laos is a Southeast Asian country crossed by the Mekong River and renowned for its mountainous terrain, French colonial architecture, hill tribe encampments and Buddhist monasteries. Vientiane, the capital, houses the That Luang monument, where a reliquary contains the sternum of Buddha, as well as Patuxai war memorial and Talat Sao (morning market), a complex full of food, clothing and clothing stalls. handicrafts.