About Maenam Song Si
Maenam Song Si is the natural confluence of the Mun River and the Mekong River at Khong Chiam in eastern Ubon Ratchathani, near the Laos border. It is notable for the distinct two-color phenomenon where the brownish Mekong and bluish Mun waters meet without immediately mixing. Viewed from a riverside viewpoint and by boat, it is a well-known natural landmark and scenic attraction of the Khong Chiam area.
Visitors guide
Visitors can expect an open riverside viewpoint overlooking the confluence of the Mun and Mekong Rivers. The two rivers show a clear color contrast - the Mekong appears brownish and the Mun appears bluish-green - especially visible from the elevated viewpoint and on boat trips. The setting is wide and open with views across the Mekong to Laos, riverside stalls, and boats available for short sightseeing cruises around the confluence area.
Key highlights
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Confluence of the Mun River and Mekong River with distinct two-color waters
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Riverside viewpoint overlooking the Mekong and the Laos riverbank opposite
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Boat trips for close-up views of the mixing zone
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Scenic photography spot especially in clear daylight
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Easternmost river confluence landmark of Ubon Ratchathani
History of Maenam Song Si
The confluence marks the meeting point of the Mun River, the largest tributary in northeastern Thailand, with the Mekong River which forms the natural border between Thailand and Laos at Khong Chiam. It has long served as a geographic landmark for the easternmost district of Ubon Ratchathani.
Culture & Context
The two-color river is a well-known natural symbol of Khong Chiam and Isan region, frequently featured in local tourism promotion. The rivers are important to local fishing and riverside communities and the viewpoint is a popular gathering place for visitors observing the natural phenomenon.
Route
| By air | Nearest airport is Ubon Ratchathani Airport (UBP), then continue by road about 80 km to Khong Chiam. |
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