Are there any zoos which have areas themed around Europe? This is tricky, since most of the fauna is very similar to or literally the same species of those of North America, but I think focusing on specific regions could work. I myself have imagined exhibits themed around the chalk downs of England and the forests of Scotland with exhibits for reptiles of England for the former and red deer, common crane, and wild boar for the latter. And no, you can't use actual European zoos. That's cheating.