Hin Lad waterfalls
Just south of Nathon and well signposted, the falls are a 2-kilometer walk from the pool at the road head. It is quite a tough trek so make sure you have decent footwear. The falls are really nice as long as there is enough water (in the dry season it is probably not worth the trek) and there is a pool that you can swim in.

Un-named Waterfalls
West of Hin Lad but sharing the same water source-Klong Lipa Yai-these falls are still hardly visited and a great place to get away from it all. They are at the en of a tough trail which can only be reached by 4WD. Take the first turning into the interior south of Nathon and follow the signs(which are quite hard to see) or better still go with a guide.

Baan Talay Resort - ( Koh Samui Hotels )