Introduction to Pearl Lake: Pearl Lake is also known as Boiled Pearl Lake. According to legend, it is a bathing pool for curing diseases created by the nine-day fairy who boiled pearls and refined springs here. Even in the severe winter with heavy snow and ice, the water temperature here is around 25°C. The sulfur smell near the pool is strong, and people often bathe here. It is said that it can cure all kinds of skin diseases.