About Chet Si Waterfall
Chet Si Waterfall, also known as Nam Tok Chet Si or Seven Colours Waterfall, is a seasonal forest waterfall located inside Phu Wua Wildlife Sanctuary in Seka District, Bueng Kan Province, northeastern Thailand. The waterfall flows over sandstone terraces forming shallow pools and is noted for sunlight creating rainbow-like colours on the rocks and water. Surrounded by dry dipterocarp and mixed deciduous forest, it is most impressive during the rainy season when water volume is high.
Visitors guide
Visitors can expect a forest waterfall inside Phu Wua Wildlife Sanctuary with tiered sandstone rock formations and shallow pools. The setting is natural forest with trails leading to the falls. Water flow is seasonal and strongest in the rainy season, when sunlight on the wet rocks can create multi-coloured reflections. Areas for viewing, photography, wading and short nature walks are available. Facilities are basic and the site is managed as a protected wildlife sanctuary.
Key highlights
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Seasonal waterfall inside Phu Wua Wildlife Sanctuary in Seka District
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Sandstone terraces and shallow pools with rainbow-like colour reflections in sunlight
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Surrounded by dry dipterocarp and mixed deciduous forest
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Best water flow during the rainy season from June to October
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Opportunities for photography, nature walks and wading in pools when water levels permit
Route
| By road | Accessible by road from Seka town to Phu Wua Wildlife Sanctuary via local roads (Highway 212 and rural roads), followed by a short forest trail walk to the waterfall. Private car or hired vehicle is the most common option. |
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| By public transport |