From A Siberian Winter, one of 31 photos. Here, a man walks through a tunnel formed by ice crystals from surrounding permafrost, outside the village of Tomtor in the Oymyakon valley in northeast Russia, on January 28, 2013. The coldest temperatures in the northern hemisphere since the beginning of the 20th century were recorded in the Oymyakon valley, known as the northern “Pole of Cold”, reaching a temperature of -67.8 degrees Celsius (-90 degrees Fahrenheit) in 1933. (Reuters/Maxim Shemetov)
From Wintry Weather: Middle East Edition, one of 32 photos. Boys play in the courtyard of the Sultanahmet mosque, known as the Blue mosque, during a snow storm in Istanbul, Turkey, on January 8, 2013. (Reuters/Murad Sezer)
From Wintry Weather, one of 34 photos. Frost covers the tips of a woman’s hair as she shields her face while facing the abnormally freezing outdoors in the Siberian city of Novosibirsk, about 2,800 km east of Moscow, on December 14, 2012. The temperatures in Novosibirsk had dropped to -35C (-31F). (Valery Titievsky/AFP/Getty Images)
From Sochi 2014: An Olympic Preview, one of 26 photos. A view of the Bolshoi Ice Palace construction site at the Olympic Park in the Russian Black Sea resort of Sochi, on December 16, 2011. The Olympic Park will be able to accommodate about 75,000 visitors when full, and all the ice arenas will be within walking distance of one other. Sochi will host the 2014 Winter Olympics that start on February 7, 2014. (Mikhail Mordasov/AFP/Getty Images)
