Beitou Thermal Valley or Geothermal Valley（地熱谷) is a volcanic crater filled with steaming natural sulfuric hot spring water. During the Japanese colonial era, the valley was known as one of Taiwan’s eight great natural beauties and the magical translucent green coloured waters gave rise to one of its pet names, Jade Springs Valley. The mineral composition of the rare green sulfur spring waters can only be found in two locations in the world, here in Beitou and in Akita, Japan.