Maurizio Gambarini / EPA
Members of the 'Berlin Seals' club swim in the Oranke Lake with a water temperature of three degrees Celsius, wearing Christmas costumes in Berlin, Germany, on December 25. The winter swimmers traditionally meet on Christmas Day to take a swim together.
Sheng Li / Reuters
A winter swimmer jumps with a mop into the icy water of the Songhua River in Harbin, Heilongjiang province, China on Dec. 26, 2011.
Filip Singer / EPA
A swimmer reacts as he climbs a ladder to leave the Vltava river after a swim within the traditional Christmas winter swimming competition in Prague, Czech Republic, on Dec. 26. Enthusiast swimmers every year brave the cold waters of the Vltava river for a swim.
Andy Rain / EPA
A Christmas Day reveller takes the plunge into the chilly waters on Brighton beach in Brighton, Britain, on Dec. 25. Hundreds of people flocked to Brighton beach for the annual Christmas day swim.
Emilio Morenatti / AP
Athletes dressed as Santa Claus jump into the Mediterranean sea as they take part in the Copa Nadal in the Spanish port of Barcelona, Spain, on Sunday, Dec. 25. The Copa Nadal (Christmas Cup) is a traditional swimming competition that takes place in Barcelona every December 25th, where participants swim 200 meters in the open sea in the port of Barcelona.