Guanyin Waterfall (中文版：觀音瀑布) is a tall waterfall in Nantou, Puli Township. You can swim at the 2nd tier, which is an easy 850 meter hike from the parking area. Butterfly season is from May to July.
Nantou County, Puli Township
Parking: 23.99433, 121.03324
Waterfall: 23.98908, 121.03542
Detailed Map: https://goo.gl/sYnkWf