Cold? Try a polar bear plunge on a sub-freezing day.

Swimmers and divers take to the cold water as the Down Under Diving Club hosts its annual New Year's Day Polar Bear Dive at Mystery Lake in Wendell, NC, on Jan. 1, 2018.
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Swimmers and divers take to the cold water as the Down Under Diving Club hosts its annual New Year's Day Polar Bear Dive at Mystery Lake in Wendell, NC, on Jan. 1, 2018.