What are the best collections in North America? As in, if you were only to go to 5 or 10 zoos in North America, which ones would it be to see the most species possible? From what I can tell, Shedd aquarium is the most obvious on this list, but some other zoos and aquariums across the country also stand out. Having many unique species is also better, because if you were to go to 2 zoos that both had hundreds of species but nearly all of them were the same, then that defeats the purpose of trying to see as many species as you can.