The Guardian reports: You think it’s cold out? Try going to Tampere, Finland, where temperatures can hit -25C in winter (-5C is considered a warm day). Now hold that thought – and imagine going for a swim in a frozen lake in those conditions. This is what locals in this inland city like to do each day, warming up in a sauna before taking a dip in breathtakingly cold water. Finnish born photographer Markku Lahdesmaki spent some time documenting this magical ritual at one of the lakes near Tampere; producing a short film that captures people of all ages calmly stepping into the hole in the ice. Far too casually in our minds. With winter swimming festivals happening around the world right now, this lot truly are an inspiration.