There are 16 craters in the park. Some of them are well preserved. The magnificent cone-shaped volcano has great geological significance. It is an ideal site for the study of the formation of volcanoes and the evolution of the earth.

The oozing lava has formed a 65-kilometre lava flow. It forms a lava flow micro-geomorphological structure including swollen hillocks, mounds, lava dams, stone pools, lava bubbles, lava caves, lava collapses and cracks and lava waves.

In the park, there are 10 collapsed lava tunnel pits. The layout of the lava tunnels follows the direction of the lava flow from northwest to southeast.

With an accumulated length of more than 20 kilometres, the lava tunnels ranges from several metres to nearly two kilometres. The longest in the world is the 27-kilometre lava tunnel in Hawaii, the United States. It is the only site in China where the micro-geomorphological structure is complete, well preserved and clear.

The colourful lava stalactites on the top of the cave and lava bed, the lava basin on the side of the caves, the flowery lava and the lava strips at the bottom of the cave are of great geological, research and aesthetic value. The underground lava waterfall is particularly special.

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