Niagara Falls freezes over
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A group of pictures shows that winter has officially arrived in Ontario, Canada with parts of Niagara Falls frozen over on Tuesday. /VCG Photo

A group of pictures shows that winter has officially arrived in Ontario, Canada with parts of Niagara Falls frozen over on Tuesday. /VCG Photo

Photos show Niagara Falls coated in thick sheets of snow and ice. /VCG Photo

Photos show Niagara Falls coated in thick sheets of snow and ice. /VCG Photo

Visitors were attracted by the beautiful freezing wonderland, taking photos and uploading them to social media. /VCG Photo

Visitors were attracted by the beautiful freezing wonderland, taking photos and uploading them to social media. /VCG Photo

CNN meteorologist Michael Guy said: "The waves of cold air will continue for the next two weeks." /VCG Photo

CNN meteorologist Michael Guy said: "The waves of cold air will continue for the next two weeks." /VCG Photo