This is indeed a bad bear enclosure. I visited Lisbon Zoo in 1997 and then it was still in use. They still had Polar Bears then in an even more miserable looking enclosure but they left the following year. However I'm very pleased to see the many changes that have taken place at Lisbon Zoo in the 13 years since I was there.
PeGe, I wish I knew, those are my dad's photos. In 1978 I was not even born! This particular bear is looking bad but it seems to be large so I'm guessing it was not one from the Pyrenees as they are small, not to mention almost extinct. I guess from somewhere in Eastern Europe?