Cataratas del Niágara, bajo cero

NIAGARA FALLS, ONTARIO, CANADA - FEBRUARY 20: Sightseers take pictures of a nearly frozen Niagara Falls on February, 20 2015 in Niagara Falls, Ontario, Canada. Much of the United States and Canada are experiencing unusually cold weather with record low temperatures and the wind chill factors making it feel well below freezing. Aaron Vincent Elkaim/Getty Images/AFP