Why should you go there and how do you do it right?

The striking feature here is the color boundary on the water. The Mekong flows deep blue, the Mun a murky orange-brown, and where they merge at the edge of Khong Chiam, they don't mix for quite some distance. It's a visual geography lesson, and from the elevated viewpoint, you can see across both rivers directly to Laos on the opposite bank.

Don't be too certain about the timing, as it's seasonal. The contrast is most pronounced during and shortly after the rainy season, roughly from July to November, when the Mun carries enough sediment to stand out against the Mekong. In the dry months, however, you might see two similar shades of brown. It's more of a short stop than a day trip, and better suited to travelers already exploring the easternmost part of Ubon Ratchathani than to pilgrims.