Kathu Waterfall is small some might say just a small stream flowing over some rocks. Would still be a nice place to visit in the evening if in the area.
There is some parking and a small convince store at the entrance.
At the entrance you can go to the right across a bridge that is over a stream. Or you can follow a path that starts next to the small store that actual goes to the Waterfall. There was very little water flow the day I was there but maybe during heavy rains could be more to see.
Next to the small store follow the path, just a very short walk.