Lodz zoo has already been mentioned but some might not realize yet how Orientarium (their new complex) proves to be popular. They got 150.000 visitors in first month after its opening in April and expect up to 1,5 million at this year end. While pre-covid, the zoo had barely 200k attendance. Even after fall of initial interest of public, I think they will stay above 1 million for years to come.
This success (second after Afrykarium of Wroclaw) will tempt other city zoos in Poland to emulate it one way or another. So watch out for other Polish rising stars!
I dont agree with Prague, its rise culminated almost a decade ago, now its platooing. Yes, we get a few new species or exhibits, but other parts of the zoo start to age. The zoo will probably spend most of its initiative on just replacing the worse parts and keeping overall quality from sliding down.
Zlin is obvious example - on steady rise. I would add Dvur Kralove - its recent investments are well accepted by public and their plans are solid. Ostrava is a question, lets see if positive growth gets prolonged with the new director.
I very much agree with you @Jana and you know much more about Czech Zoos. I realize that Prague is not a news and they can be good rising star example decade ago. What incline me to mention them here is the high quality of their latest additions and the consistency in their work. Adding Tasmanian Devils, Wombats, Lear’s macaw and especially Pangolins to the collection is also strong recognition and puts them in one sentence with the Europe's front-runners Pairi Daiza and Beauval. I am not sure what is the case with the Cat house, but they tend to recognize their shortcomings and keep improving. I also thing that Prague still set the tone for much of the other Eastern European rising starts.