Thi Lo Su Waterfall Located in the Umphang Wildlife Sanctuary, is the most beautiful waterfall in Thailand.
Originating from Huai Klotho, it flows down a mountain valley at a height of 200-300 metres. The fall flow down in tiers surrounded by virgin forest. There is a trail to the waterfall from the wildlife sanctuary office. It takes approximately 15 minutes to walk, and there are places to stop and admire the impressive views from the top. To get there, follow a small road off the main road from Umphang for 27 kilometres. Visitors must follow the set route, or raft and walk through the forest. Vehicles can enter between November to April only.