Dehena Ella - waterfall is about 20Km from Rathnapura on the Rathnapura - Wewalwaththe road. It is surrounded by lush jungle and is by the side of the road. When there is heavy rain in the upper reaches it becomes a roaring torrent. Click on the link below to view it.
http://www.youtube.com/watch?v=LW4CgR7bFBc
http://www.youtube.com/watch?v=LW4CgR7bFBc