About 6km south of town is the much-venerated Pha That Sikhottabong, which stands in the grounds of a 19th-century monastery of the same name. Considered one of the most important tâht (stupa) in Laos, Sikhottabong was first renovated by King Setthathirat in the 16th century, when it assumed its current general form.
The site of a major festival each February, it was again restored in the 1950s and later augmented in the 1970s. A wihǎhn (temple hall) on the temple grounds contains a large seated Buddha, constructed by the order of King Anouvong (Chao Anou). Adjacent to the temple is an interesting open-air museum consisting of nine wooden houses showing the various traditional architectural styles of Khammuan Province.