Nagasaki's most famous waterfall is a great place to cool off in the hot and humid summer months. Surrounded by beautiful nature, the biggest swimming hole is more than 10 meters deep, but there are also more if you walk along the river. The adventurous can test their guys at a roughly 5 meter high Tarzan swing! There is a somen-nagashi (flowing noodles) restaurant at the parking lot. A great place to spend the afternoon in the summer or a nice place for meditation in the cooler months.