Geothermal Valley is located near Taipei Beitou Park, also known as Hell Valley. It is one of the sources of Beitou hot springs and the hottest springs in Datun Mountain Group. Geothermal Valley hot springs are clear and bottomless. The temperature of blue-green hot springs is about 90 to 100 degrees Celsius. The water quality belongs to acid hydrochloric acid springs. Therefore, the geothermal Valley is also called Qingsuan Spring. Geothermal valleys emit white smoke all year round, but those are definitely not good gases, but sulfur smoke, which is harmful to people's health. Therefore, it is also called ghost Lake by the residents around it. However, those sulfur fumes also add a layer of fantasy color to the geothermal valley, smeared with a strong mysterious atmosphere, so this scene of the geothermal Valley is also known as "mineral spring jade fog". As soon as we approached, we could smell a smell of sulphur. These hot springs have curative effects on arthritis, muscle ache, skin diseases, bronchitis, gout, neuritis, uric acid excess and other symptoms.