New York's Niagara Falls is gripped by freezing weather, but that hasn't stopped tourists from braving the icy mist or children from enjoying the snow.
But it's not all fun and games.
A large swathe of the northern US from Montana to Maine is expected to see temperatures below -12 degrees Celsius - and that's putting lives at risk.
In snow-hardened Chicago, officials are blaming the cold for at least two deaths.
Lee Lane found refuge in a city shelter.
"Imagine a person without this. I can't even imagine that," Lane said. "You would pretty much die in the street. You would freeze to death".