Last year we spent a beautiful weekend floating in the crisp clear glacial fed waters of Annette Lake in the Rockies. I must say the temperature contrast up here between summer and winter is hard to fathom as an Australian. When were were up at this lake in winter it was a good 70 deg C (126 deg F) colder than it was on this summer day (from +35C down to -35C). Jasper National Park, Alberta. Canada

_{Image taken by and remains the Copyright of Robert Downie - http://www.robertdowniephotography.com}