People run to the next sauna during the sauna marathon near Otepaa, Estonia, February 6, 2016. Participants have to track down and visit the given saunas in the Otepaa area as fast as possible. (Photo by Ints Kalnins/Reuters)





A woman leaves a cold water pool during the sauna marathon near Otepaa, Estonia, February 6, 2016. (Photo by Ints Kalnins/Reuters)





People wait to jump into a cold water pool during the sauna marathon near Otepaa, Estonia, February 6, 2016. (Photo by Ints Kalnins/Reuters)





People perform additional exercises on four-person skis during the sauna marathon near Otepaa, Estonia, February 6, 2016. (Photo by Ints Kalnins/Reuters)





A man rests as he listens to local musicians during the sauna marathon near Otepaa, Estonia, February 6, 2016. (Photo by Ints Kalnins/Reuters)





People start during the sauna marathon near Otepaa, Estonia, February 6, 2016. (Photo by Ints Kalnins/Reuters)





People run to the next sauna during the sauna marathon near Otepaa, Estonia, February 6, 2016. (Photo by Ints Kalnins/Reuters)





A man runs to the next sauna during sauna marathon near Otepaa, Estonia, February 6, 2016. (Photo by Ints Kalnins/Reuters)





People run to the sauna during the sauna marathon near Otepaa, Estonia, February 6, 2016. (Photo by Ints Kalnins/Reuters)





A man jumps into a cold water pool during the sauna marathon near Otepaa, Estonia, February 6, 2016. (Photo by Ints Kalnins/Reuters)





People enjoy a bath in hot kvass, a traditional fermented beverage made from rye bread, during the sauna marathon near Otepaa, Estonia, February 6, 2016. (Photo by Ints Kalnins/Reuters)