Rare ice canyon formed at Hukou Waterfall
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A rare ice canyon is spotted over a section of the Yellow River's Hukou Waterfall due to continuously low temperatures. /VCG Photo

A rare ice canyon is spotted over a section of the Yellow River's Hukou Waterfall due to continuously low temperatures. /VCG Photo

It became a rare natural ice bridge after an upstream of flowing ice rushed into a bottleneck of the Yellow River, which caused a large number of flowing ice to pile up and raise the water surface. /VCG Photo

It became a rare natural ice bridge after an upstream of flowing ice rushed into a bottleneck of the Yellow River, which caused a large number of flowing ice to pile up and raise the water surface. /VCG Photo