Artis has 2 bear enclosures, both very small and without any vegetation, just concrete pits. One was used for sloth bears a few years ago and one for polar bears. Then (around 2004) the last sloth bear was sent to another zoo (Beekse Bergen) and the last polar bear, female Tanya, got both enclosures. Which was still a bad situation. A few weeks ago Artis has finally sent Tanya away (to Rotterdam Zoo where a totally new polar bear enclosure has just been opened!). The 2 bear enclosures in Artis will get a renovation and will probably used for one (male surplus) spectacled bear. I`m not sure if that is such a good idea because although spectacled bears are smaller, the old bear enclosures in Artis are not suitable for ANY bear species, so I`d better see some small mammals (coatis, or lemurs for example) in there.
The plan is to build a new polar bear enclosure in a few years. I personally hope these plans will change because I don`t think that Artis has enough space for that.