
360 people swim in the very cold Vltava River in Prague, Czech Republic. This event takes place every winter. This year, people remember Alfred Nikodem.
Alfred Nikodem was a Czech goldsmith(金匠). He was a hardy(吃苦耐劳的) man. He liked to swim in cold weather. He first swam in the Vltava River in winter of 1923. A few friends swam with him. More than 50 people swam five years later. The number of swimmers gets bigger every year.
The river water is icy this year. It is only three to four degrees Celsius(摄氏度). Swimmers swim 100, 300, or 750 meters. The fastest swimmer swims 750 meters in 9 minutes and 11 seconds.