The top-rated Audubon Zoo replicates some of the world’s most diverse habitats — from the swamps of Louisiana to the grasslands of Africa — and the creatures that dwell in them, among them Komodo dragons and two rare white tigers. The zoo is part of the Audubon Nature Institute that also manages the Audubon Aquarium of the Americas. At the aquarium on Canal Street, you can walk through an underwater reef tunnel, twinge with fear at the tropical sharks, watch penguins play and go hands-on with exotic birds. Don’t forget the Audubon Butterfly Garden and Insectarium, also on Canal, for an up-close glimpse of creepy crawlers, butterflies and edible insects. Go to www.auduboninstitute.org.