Swim in ice cold waters In Finland, the natives can go a little bonkers – and insist you do the same by taking part in their long-running custom of taking a swim in an ice hole. Of course, the Finns being as they are, you're encouraged to do this with nothing but your Speedos on to prevent you from making an instant sperm bank deposit. However, you do have the option of heading into the sauna first to warm up, while the locals you a pussy. Watch a video of ice-hole swimming in Finland here.