Unzen Hot Spring
Unzen Hot Spring is located at the foot of Mount Unzen, an active volcano. The Japanese as well as tourists flock to this area for the healing waters (both cloudy and clear).
This area reminded me of several areas in Wyoming that have hot springs (Thermopolis, Yellowstone, Saratoga, and an area around Fort Washakie.)
The Mount Unzen violently erupted in 1991 and 43 people (scientists and journalists) died. Prior to eruption, the area was evacuated, preventing further loss of life.