Not really, it extends a little out to either side, but otherwise that's it - though it looks smaller in this picture than it really is I think. It's been built with an eye to being a mother and cubs area after she dies, I suspect. It adjoins one of the large Polar Bear enclosures where the more usual-looking Polars are.
She has sometimes access to one of the big enclosures. This one is sadly too small. After the death of the two old Polarbears i guess she'll move there.