The 79th edition of the oldest Czech winter swimming contest will be held near the National Theatre, between Slavonic Island and Střelecký Island. The event will start at 11 a.m. and will be attended by hardy men and women. The memorial is called after Alfred Nikodém, who was a goldsmith in Prague and a proponent of the Spartan lifestyle. Winter swimming was first seen in Prague in 1923 when he and six other enthusiasts plunged into the freezing cold Vltava River watched by a crowd of stunned onlookers. More information (in Czech)