World heritage expert goes to ice cave
By Sun Ruisheng ( chinadaily.com.cn )
Updated: 2017-04-27
![World heritage expert goes to ice cave](../../images/attachement/jpg/site1/20170427/f8bc126e49161a6bfd6d0c.jpg) |
An ice cave stays below freezing despite the arrival of spring in Ningwu county, North China's Shanxi province. The ice cave was formed about 3 million years ago and its temperature stays at -6 Celsius degrees throughout the year. [Photo by Wang Quan / chinadaily.com.cn]
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