
Photo: しんかわな · CC BY-SA 3.0 · Wikimedia Commons
Yunoyama Onsen is a hot spring town in Mie, Japan. Officially the water is classed as radioactive spring. About 2.25 million people a year come to bathe.
Contains trace radon that leaves the water quickly. Also called radium or radon springs.
Figures from the town's Japanese Wikipedia article.
English Wikipedia · Japanese Wikipedia
Planning a first soak? Read how an onsen stay works, and what to do if you have tattoos.