Thanks a lot to everybody for your tips and recommendations!
@Sarus Crane, your non-zoological recommendations are very complete, but I guess my mother will know/search them actively, maybe she visit these kinds of places (she loves art museums) while leave me in a zoo or something

For my side, I find boring everything in life that is not biodiversity-related so I only will visit those places where my mother ask me to stay (she don't speak english and have some motion problems).
As for AZA or non AZA zoos for me is absolutely the same and I will never care to know if a zoo that I visit is AZA or ZAA or WAZA or whatever. I don't care also about what subspecies of leopard are kept by a zoo, since the important thing is the species, so it's a common leopard. I saw vicunas in a number of occasions.I also have bearded pigs in my photo archive, as well as all those monkeys mentioned. I don't know if I will dislike the New England Aquarium like you, but very probably not, as they have flower hat jellyfishes, goosefish and other fantastic rarely seen things (nothern fur seals also will be lifers for me). For sure I will NOT skip the Harvard Museum, I took a look on this website and they looks like having a lot of specimens of species that I don't have photographed nor seen before. Of course I always prefair photographing a live-looking specimen in a diorama over a 19th century style taxidermy mount badly stuffed (and also a live specimen over one in a diorama, as far as the resulting photo is of enough quality), but this is a minor point. I guess that the Harvard Museum will be much better for me than all the zoos of Masachussets together. I don't care if a species is charismatic like a Kronosaurus or is a tiny bird or a beetle, as far as it's a species that I lack, rarely seen, distinctive and preferably known for me (but a thing that I care is if the dinosaur and other ancient life pieces are real fossil or casts, I only photograph the former). Now
@ThylacineAlive talks my language!! Northern tamandua is quite a thing to be considere, instead the Southern that are in every other zoo. However, if it's behind the scenes it's the same for me as if they don't have it
Knowing that non-AZA zoos can keep species that are phased out by AZA, I would say that I would tend to prefair a lot non-AZA zoos over AZA zoos!!! (actually I just don't mind about the membership of a zoo, but I strongly dislike the fact of any species being phased out).