I've been to zoos all over Europe and a few in Ame...

I've been to zoos all over Europe and a few in America, but Audubon Zoo New Orleans is by far the best zoo I've visited so far.
The enclosures are species-appropriate and as far as possible a view is possible that is not disturbed by fences or the like.
The white alligators and white tigers are special highlights.
The zoo can be easily reached from the French Quarter by public transport.
However, a walk is also quite interesting, as you can admire many of the magnificent buildings on the way.