Namtok Soi Sawan

Namtok Soi Sawan cascades over seven rock tiers about 15 km from Pha Taem National Park’s headquarters in Khong Chiam district, Ubon Ratchathani — close enough to combine with the park’s clifftop viewpoints in a single day, far enough that it keeps a fraction of their crowds. Standard Pha Taem gate fees apply: 40 THB for Thai adults (20 THB children), 200 THB for foreign adults (100 THB children). The park is open daily, 08:00 to 16:30.

“Soi Sawan” translates as heavenly necklace, a name that describes what happens where two forest streams meet and thread down the rock face together, tier after tier, like beads on a strand. The base pool is the deepest and most popular for swimming, ringed by boulders that make decent spots to dry off between dips. Scrambling up to the higher pools shows the same cascade from different angles, though footing gets more uneven the higher you go.

A roughly 20-minute forest walk connects the car park to the main cascade, crossing a couple of stream sections that turn slippery in wet weather — sturdy shoes matter more here than at more developed waterfalls with concrete paths.

Insider Tip: Visit on a weekday if you can. Soi Sawan sees far fewer visitors than Pha Taem’s main viewpoints, but weekend day-trippers from Ubon town still concentrate at the base pool by midday.

Flow peaks in the rainy season, roughly June through October, when all seven tiers run properly; by the dry months the upper levels can thin to almost nothing while the lower pools still hold water.

Watch out: conditions upstream in the park can change fast after heavy rain — water can rise and cloud within an hour, so don’t linger in the pools if the current picks up or the water turns noticeably browner.

Combine the falls with Sao Chaliang’s wind-carved rock formations or the Two-Colour River viewpoint where the Mun and Mekong meet — both sit within the same national park and make an easy add-on to a Soi Sawan morning.