Ice cave viewed in north China's Shanxi's Ningwu County (2)

NINGWU, April 18, 2016 (Xinhua) -- Tourists visit an ice cave in Ningwu County, north China's Shanxi Province, April 18, 2016. The ice cave in Ningwu, with a history of over three million years, provides remarkable spectacle of icicles, icefalls and ice stalagmites to visitors. (Xinhua/Zhan Yan)