The effect of a frozen waterfall is created when splashes of water turn into ice right in the air. Besides, technically the falls never freeze because there's such a mass of water moving at such a speed that the perpetual motion of the cascade prevents the Falls from freezing totally.
Coated in ice, the Falls attracts masses of tourists who are eager to take memorable pictures in front of the "frozen giant".
Check out Sputnik's photo gallery to see one of the world's most famous natural phenomena.