Fan Waterfall (中文版：扇子瀑布) is an impressive waterfall in Yilan, Nanao Township(宜蘭縣南澳縣). You can trace up the river one kilometer, or walk along a path on the ridge. The easiest way is to hike halfway up the river, then transfer the path. No matter which way you go though, you'll still have to cross North Nan'ao River to get to the trailhead.
Hiking up the river takes close to an hour.
There is also a small path, but it's not as nice as hiking up the river.
Yilan County, Nan'ao Township
Parking: 24.50468, 121.76335
Waterfall: 24.51294, 121.77012
Detailed Map: https://goo.gl/3TtA64