That walkthrough was discontinued within 2 years of its inception according to the comments below the picture
Thanks, that must be a recent change then? Big upgrade for the Amur leopards.
There is no sequel in the works or being planned currently and that is unlikely to change in the near future
I cannot comment on the quality of individual US zoos, as I haven't visited any. But I can make some general statements:
- Europe has far more zoos than the US, this automatically means there is a bigger chance something unique will appear somewhere.
- Europe consists of dozens of countries, with even more cultural differences than countries (just ask the Swiss

), this also means that human-animal relationships are viewed completely differently across the continent, with many countries having a zoo culture with unique characteristics. An average Scandinavian zoos is so different from a typical Spanish zoo, as is a Czech from a French zoo etc. These between-country differences are just not there in the US (even as states can differ quite a lot in their attitude)
- There is a lot more zoo history in Europe, with the first European zoo being founded roughly 100 years prior to the first US zoo. This means there are a ton more historic zoo buildings and automatically means that many early innovations come from Europe.
That doesn't mean there hasn't been any innovation in the US. When it comes to immersion and cultural theming, US zoos have been on the foreground and European zoos have played catching up. The same probably goes for aquariums, with mega aquariums being a more prominent feature in the US. US zoos also in general have the luxury of much higher budgets (and donations), which offers possibilities, but sometimes seems more geared towards visitor amenities than in Europe (at least from a distance).