A wave of Arctic air from the polar vortex has turned Niagara Falls into a dramatic winter scene. Thick ice has formed along the cliffs, creating frozen waterfalls that continue to attract tourists, according to USA Today.
Despite its appearance, the falls never fully stop flowing. Ice forms along the river and surrounding rocks, making it look as though the water has frozen solid. Niagara Falls last froze completely in 1848 on both the American and Canadian sides, and again in 1936 on the American side. Today, modern river management systems prevent a full freeze.
The extreme cold...