The most peculiar landscape of Jingbo Lake can be said to be in the volcanic lava tunnel, showing a special state of "water and fire blending", twists and turns, deep and confusing, adding a mysterious color to Jingbo Lake. According to scientists, the "lava tunnel" was formed when a volcanic eruption occurred 4000-8000 years ago. It looks like a karst "karst cave" in the limestone area of Guilin, Guangxi, but it is essentially different from the cave. . When the volcano falls, the raging hot lava flow rushes down the valley low, and its surface first cools into a hard shell, while the interior is still in a high temperature flow, forming an underground lava river. When the magma source is exhausted, it is in the lava. Inside the stream, there is a huge underground cavity, the lava tunnel. Into the eye-opening, the hole is up to 6 meters, the maximum is 30 meters, the longest is up to 500 meters, such as the underground Xinzhuang. Due to the geological role of lava, various forms of fantasy are formed. The caves are deep and twisted, and they are intricate and unique.