"Niko Yuan" is located in the upper reaches of the Niyodo River, and is known as "this is the genuine Rendian blue". The small pools where the clear stream falls straight down and gathers, although it is a pool at the bottom of the waterfall, the water quality is so clear and transparent that the bottom of the pool can be seen. Niko-yeon is located at the bottom of the valley, surrounded by trees, with less sunlight, and the color of the water changes to green or blue over time. Around noon, the sun shines directly from the top, and it is closer to "Nendian Blue" at this time, and many tourists will visit at this time. It takes about 5 minutes to walk from the road to the deep pool. The slope is steep and you need to use a rope or ladder to get there. It is also surrounded by lush vegetation, so it is recommended to wear dirt-resistant shoes and clothes that are easy to move around. In addition, in order to make "Rendian Blue" long-lasting and appreciated by future generations, please do not discard garbage or do other acts that damage the environment. "