The Japanese onsen is something reported by many travel sites as a cant miss experience. Many of the more popular spas, powered by incredibly hot spring water, are located in the mountainous regions of the country. Because of this they are highly regarded not just for their therapeutic values, but for the beauty which the onsen is built around.
To me, this sounded like a great experience and something I absolutely had to try. So when I made the trip north to check out the Nikko temple shortly after my arrival to the country, I knew I had to check one out.