Unfortunately not, this is the main enclosure. As I posted elsewhere:
Tallinn Zoo has been on its current site since 1983. When the zoo moved to this area they took over a former military instillation. Estonia was under occupation at this time and the Soviet authorities in Moscow had imposed a ban on construction projects following the 1980 Olympics (Tallinn hosted the sailing events) so they had to make do and mend with no significant building taking place until the end of the 1980s.
The zoo is fundraising for a new polar bear enclosure. Given the standard of recent developments I'm sure it will be impressive. Signs at the zoo invite visitors to donate via SMS and there are appeal collection boxes for the new enclosure in various locations around Tallinn including the Stockmann department store and the departures area of the airport. They are hoping to raise €4 million for the new project.
I recommend having a look at the whole gallery as the good enclosures outweigh the remaining poor exhibits as the zoo. But there's no disputing the fact that this is an upsetting exhibit.
Its hard to believe that this exhibit is just 30 years old.
It is heartening to know that the authorities are well aware of the shortcomings of some parts of its zoo. There is a city-wide campaign, with posters and advertisements all over the place, to raise funds for a new exhibit. There was certainly a lot of building work going on in the new part of the zoo when I was there earlier in the year. For all I know, this could have been the start of the new polar bear feature.
One thing is for certain... I've never seen whiter polar bears in any zoo before or since.
On the page tallinnzoo.ee/en in the gallery there is a heading jääkaru uus kodu. There are the pictures of the polar bear exhibit they are fundraising for.