Two matters that I would like to adress:
1. What is the deal with Knut at Berlin Zoo right now? Is he for some reason seperated from the other bears there? I seem to recall that there is only one polar bear enclosure.
2. The place in Sweden he would possibly go to is an excellent one. It is called Orsa Björpark (Orsa Bear Park), situated way up north. Their web page is only in Swedish but I will link to it anyway:
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It contains very large enclosures at the foothills of a big mountain. According to the web page, the polar bear exhibit that is under construction and will be opened in 2009, is going to be the biggest in the world. And this is in a cold climate far up north in Sweden. Knut could not do better but to move here.
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I seem to recall reading a very touching testimony about this park somewhere. Apart from bears it also holds Amur Tigers. The tiger house is apparently situated high up on the foothills of the mountain and have a window from where the tigers can look out on their surroundings - miles and miles of Swedish forest. I guess the story must be from when the tigers had only arrived and were put in quarantine inside the house. They would sit for hours and watch out through the window, being fascinated by the fact that they could see for miles. (Of course they have a very large outdoor enclosure as well).
This story is one of the reasons why I, on this site, always advocate the possibility for zoo animals to have as wide outlooks as possible from their enclosures.