Thee Lor Sue Waterfall locateed in the Umphang Wildlife Sanctuary, is the most beautiful and biggest in Thailand. Original from Huai Klotho, it flows down a mountain valley at high of 200-300 metres and a width of almost 400-500 metres. The falls flow down in tiers surrounded by virgin forest. There is a trail to the waterfall from the wildlife sanctuary office. It take approximately 30 minutes to walk, and there are place to stop and admire the impressive views from the top. In the wet season, Tee Lor Sue waterfall will be at it most beautiful. To get there, follow a small road off the main road from Umphang 27 Kms.Visitor must follow the set route, ro raft and walk through the forest. Vehicles can enter between December-April only.