Ravana's Waterfall (free) is also place one can spend more than an hour. It's loud waterfall which rocky access where you can get sprayed with fine mist. Ella is definitely one the breathtaking place I've seen and both hikes are worth doing.
Google Maps showed me Ravana falls at a distance of 6 Kms from my location. To save some time, I thought of hitchhiking. So, I raised my thumb high. I could see a motorcycle approaching, it stopped and offered me a ride.