The ice cave located in Ningwu county, North China's Shanxi Province, has a history of over three million years. It is over 100 meters deep with five stories. The cave provides a remarkable spectacle of icicles, icefalls and ice stalagmites to visitors, just like an underground crystal palace.

Tourists visit the ice cave in Ningwu county, North China's Shanxi province, on April 18. [Photo by Zhan Yan/Xinhua]