Standing with your back to the tank, head to your right. Follow the path that continues downward until you come to a small plaque marking a large Yew tree on your right. Keep going! You will pass a Roman arch on your left. Continue on the same path as it descends. Eventually, you will come upon a slender waterfall that will appear on your left. There, a plaque will inform you that you are now in Fern Valley. Stand facing the waterfall, and take a moment to listen to the water and its history.