Geothermal Valley is one of the most representative spots in Beitou Hot Springs. It is located at the back of Beitou Park and is one of the sources of Beitou Hot Spring. It is known as mineral jade fog and is the eighth victory of Taiwan in the Japanese occupation era. One of the twelve scenes. The valley is often filled with corrosive sulfur smoke for a long time, and the water temperature is very high. In the past, tourists often suffered from burns and accidents, so they were once called "Hell Valley." The brook in the geothermal valley has been confirmed by the academic community to contain the rare and rare radioactive element "Radium" and has been officially named "Beitou Stone". This is the only ore of more than 4,000 kinds of ore on the earth. The only place in the world is the Beitou area and Japan's Tamagawa. In 1994, the Taipei City Government handed over the management of the geothermal valley to the water supply and reorganized the geothermal valley landscape, guiding the spring flow, and surrounded by trails and handrails. There was a scenic pavilion next to the trail, surrounded by cobblestones. With a hydrophilic ditch, visitors can soak their feet in the hot springs and enjoy a warm foot bath experience.