Three tiers
About 150 metres of water.
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Khao Yai's tallest and most imposing waterfall, on the park's southern side, dropping in three successive tiers totalling about a hundred and fifty metres into a narrow forested gorge. Its name means abyss of hell, for the force of the water in the wet season and the depth of the gorge it plunges into. A paved path runs about a kilometre through the forest from the car park, then steep stairs lead down to a viewing platform facing the first tier, an awe-inspiring view when spray fills the air. The climb back up is tiring, so take your time and enough water. The waterfall is covered by the park fee, and going into the water is not allowed. It is at its most powerful from August to November, and at the height of the rains the lower platform may close if the water rises, so ask the rangers. In 2019 the water here swept away a herd of wild elephants, so the gorge is genuinely dangerous in flood. It is about an hour's drive south of the visitor centre, so combine it with leaving the park on the Prachinburi side, or give it half a day.
About 150 metres of water.
Facing the first tier.
Clad in rainforest.
Southern side of Khao Yai National Park, on the Prachinburi road
The path is easy, but the stairs to the platform are steep and the climb back is tiring for anyone not used to steps.