Yunomine Onsen is a historic hot spring located in Wakayama Prefecture, Japan. It is known for its natural mineral-rich waters, which are believed to have healing properties. The onsen has been used for over 1,000 years, making it one of the oldest in the country. Visitors can enjoy traditional Japanese ryokan accommodations and experience the serene atmosphere of the surrounding mountains. The onsen features several public baths, including the famous Yunomine Onsen Tsuboyu, which is a UNESCO World Heritage site. Guests can also explore nearby attractions, such as the Kumano Kodo pilgrimage routes, enhancing their cultural experience while enjoying the therapeutic benefits of the hot springs.