Not even the power of Niagara Falls can stand up to the epic cold snap that's settled in over parts of New England, the Midwest and the South this week.
More than 115 million people have been layering up as temperatures have plunged 25 to 45 degrees below normal, from Canada all the way down to Florida. It may be one of the warmest winters on record nationally, but this week it's hard to imagine a spring just a few weeks around the corner.
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HuffPost's photo editors compiled this stunning list of things you probably didn't know could freeze over, including Niagara Falls -- which can pour more than 150,000 gallons a second -- and a frozen spring that looks like it belongs in Elsa's castle. Take a look below.
Niagara Falls Frozen
tvereecken / Instagram
fenyloo / Instagram
just_yanap / Instagram
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Frozen Spring at Letchworth State Park
JoBeth Rath
A natural spring that fills a nearby pond at Letchworth State Park in New York froze on Feb. 18, 2015.
sierrarharmon / Instagram
Frozen Building
sparkleplenty11 / Instagram
A building in West Philadelphia is covered in ice after firefighters used water to put out a fire at the address.
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stritchitup / Twitter
Frozen Fountain at Bryant Park
Spencer Platt / Getty Images
The frozen fountain at Bryant Park in Manhattan is viewed on a bitterly cold day on February 13, 2015 in New York City.
Frozen Lake Superior
LAKSuperiorFoto / Twitter
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Tahquamenon Falls, Michigan
LAKSuperiorFoto / Twitter
Lake Michigan
ASSOCIATED PRESS
Ice forms along the shore of Lake Michigan, Thursday, Feb. 19, 2015, in Chicago. Temperatures have dipped to as low as -13 in parts of Illinois with wind chills forecast to fall to between 20 and 30 degrees below zero. (AP Photo/Kiichiro Sato)
Calumet River
ASSOCIATED PRESS
Ice fills the Calumet River Thursday, Feb. 19, 2015, in Chicago.
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Lake Erie
ASSOCIATED PRESS
Downtown Cleveland appears to rise from ice-covered Lake Erie in a view from Lakewood Park, in Lakewood, Ohio, Tuesday, Feb. 17, 2015.
Washington, DC Tidal Basin
Katherine Frey / The Washington Post / Getty Images
A jogger runs past the frozen Tidal Basin as a light snow falls on President's Day February, 16, 2015 in Washington, DC.