Congratulations to @pachyderm pro for bringing @lintworm back from obscurity, as I had feared that he was wandering around inside his beloved Burgers' Bush and trapped forever. I actually toured that rainforest with him and there are trails everywhere and it would be easy to get lost. Thankfully he wasn't eaten by a caiman. 
There was mention of a sequel to Europe's 50 Must See Zoos and I think that it would be glorious if someone put in the immense effort to come up with The World's 50 Must See Zoos. Maybe that is the sequel that @lintworm is talking about? Fingers crossed!
I've often thought about doing a thread titled America's 50 Must See Zoos, or even possibly North America's 50 Must See Zoos, but there is not the deep, rich history of zoos as can be found in Europe. In the USA there are maybe 800 zoos, aquariums, nature centers, etc., but in Germany alone there are circa 500 'zoos', plus another 400 or more between England and France, and therefore thousands of zoos across Europe's approximately 50 nations. The selection of zoos is therefore infinitely greater in Europe than what can be found in North America.
If one were to do a (North) America's 50 Must See Zoos, there would be many obvious possibilities but also a lot of zoos that don't compare to their European counterparts. For example, Roger Williams Park Zoo opened in 1872 and is one of the oldest existing zoos still operating in North America, but there is nothing historic about it and nothing 'must see' whatsoever.
There was mention of a sequel to Europe's 50 Must See Zoos and I think that it would be glorious if someone put in the immense effort to come up with The World's 50 Must See Zoos. Maybe that is the sequel that @lintworm is talking about? Fingers crossed!
I've often thought about doing a thread titled America's 50 Must See Zoos, or even possibly North America's 50 Must See Zoos, but there is not the deep, rich history of zoos as can be found in Europe. In the USA there are maybe 800 zoos, aquariums, nature centers, etc., but in Germany alone there are circa 500 'zoos', plus another 400 or more between England and France, and therefore thousands of zoos across Europe's approximately 50 nations. The selection of zoos is therefore infinitely greater in Europe than what can be found in North America.
If one were to do a (North) America's 50 Must See Zoos, there would be many obvious possibilities but also a lot of zoos that don't compare to their European counterparts. For example, Roger Williams Park Zoo opened in 1872 and is one of the oldest existing zoos still operating in North America, but there is nothing historic about it and nothing 'must see' whatsoever.
, and contributing to the site wasn't as pleasant as it used to be. Fortunately some things seem to have changed for the better since then... 
and I am definitely glad that I went with the "Year of Zoo Guides" as my attempt at provoking community spirit rather than one of my other ideas, which I originally shelved ages ago when you said you were planning something similar! I imagine there's a decent chance said idea is what you have up your sleeve now.