Hua Sai Yai Waterfall (Kaeng E Khiao) is located within the Buntarik-Khao Yod Mon Wildlife Sanctuary. This stunning waterfall is situated 26 kilometers north of Buntarik District, along Route 2369 leading to Huai Sai Village. After reaching kilometer 29, there is a right turn to go an additional 6 kilometers. The waterfall cascades beautifully down the rocky ledges, surrounded by lush greenery and abundant water flow, particularly during the late rainy season. The best time to visit is from September to December.