An expedition cruise to the world’s polar realms offers the chance to take photographs, the like of which you will have never thought possible. From blue-hued tabular icebergs to sunset-burnished mountain peaks, there will be riotous penguin colonies and large-eyed Weddell seals in the and lumbering polar bears and belching walruses in the that will fill up your memory card before you can say trip-of-a-lifetime.;