Nikko is famous for its hot springs, known as onsens. There are several onsens in the area where you can relax and unwind in the warm mineral-rich waters. During winter, soaking in an onsen is especially enjoyable as you can experience the contrast between the cold air outside and the warm water. The onsens offer a tranquil and rejuvenating experience, perfect for warming up after a day of exploring the winter beauty of Nikko.