Asan Onyang Hot Springs
- Location
- Onyang, Asan, Chungcheongnam-do, South Korea
- Water type
- sodium chloride
- Temperature
- 40 °C
- pH
- 7.3
Water profile
Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Dense, salty water — you float without effort.
Asan Hot Spring Resort is located in Asan City, South Chungcheong Province, South Korea, in the gently rolling agricultural landscape of the Asan Bay hinterland — a city historically significant as the site of the Battle of Asan in 1894, the first major engagement of the First Sino-Japanese War that marked the beginning of Japan's imperial expansion on the Korean Peninsula. The bicarbonate thermal waters of Asan emerge from the deep Precambrian basement geology of South Chungcheong Province, which is distinguished by being the province with the greatest concentration of natural hot springs in Korea, and have been used therapeutically for over a millennium — Onyang's historic hot springs in Asan, historically the most famous in Korea, were used by Korean kings during the Joseon Dynasty and are specifically documented in royal court records. The modern Asan Hot Spring Resort preserves this ancient therapeutic heritage in contemporary wellness facilities, combining Korea's oldest documented royal bathing tradition with the full range of modern Korean spa culture within the conveniently Seoul-accessible Chungcheong region.