Marco Fois dives into the Tiber River from the Cavour bridge in Rome, Italy, as part of traditional New Year celebrations Jan. 1, 2011. Five men sprinkled the muddy water of the Tiber with sparkling wine before taking the plunge from the Cavour bridge, continuing an annual tradition which dates back to 1946.

Thousands of people run towards the North Sea during the annual New Years Dive at Scheveningen, the Netherlands, Jan. 1, 2011.

An ice swimmer of 'Seehunde Berlin' (translates to Berlin Seals) takes a dip in the frozen lake Orankesee in Berlin, Germany, Saturday, Jan. 1, 2011. Traditionally the ice swimmers welcome the New Year by taking a bath in the ice-cold water on New Year's Day.

A member of the U.S. Air Force, assigned to ISAF Regional Command (South), reacts to the water temperature while participating in a "Polar Bear Plunge," in Kandahar on Jan. 1, 2011, held to celebrate the New Year. The event, hosted by the Dutch military contingency, brought together over 200 participants from various international military forces.