The Wudalianchi volcano group has 14 independent volcanic cones and a series of shield volcanoes. The volcanic cones and shield volcanoes formed in the Quaternary, and the most recent eruption occurred in 1719 AD and in 1721, in Old Montenegro and Fire Mountain. The eruption of lava blocked the Shilong River in four places, forming five volcanic lakes, and eventually forming "Wudalianchi". Wudalianchi mineral water is one of the world's three major cold springs, with iron silicon, magnesium-calcium heavy carbonate cold mineral water. Mineral water mainly includes Yaoquan Mountain, Erlong Spring and so on. Mineral water can treat various skin diseases, and there are endless numbers of people coming here to recuperate every year. In addition to the volcanic cones, Wudalianchi has many special landforms left by magma after cooling. More typical is Longmen Shizhai, erupting 28 - 340,000 years ago, rolling magma down the slope, after the upper solidification, the lower rock flow propulsion fractured into blocks, after many Longmen Mountain eruption movement and large earthquake screen shake, spewing many stones, stone pillars. The Bailong Cave in Wudalianchi is the longest volcanic underground lava tunnel found in China. The temperature in the four seasons is minus 12.℃, hundreds of thousands of years of ice cover, smooth as a mirror, the cave wall is full of frost column ice flowers, beautiful.