Yunomine Onsen 湯の峰温泉
Here, the tradition of hot springs is as old as the pilgrimage routes of the surrounding area. Kumano pilgrims have been relaxing in the hot springs of Yunomine for centuries.
Numerous local inns take advantage of these volcanic waters, while shops offer recipes of mushi jigoku ryori ("steamed hell cuisine"), usually eggs or other foods steamed in the naturally boiling pools.
The crown jewel of Yunomine: Tsuboyu, a century-old cottage (dating back from the twelfth century) is probably one of the oldest baths in Japan. The Kumano Pilgrims practiced purification rituals in this exceptional onsen, now public and listed as a Unesco World Heritage site.