Audubon Zoo in New Orleans was redesigned
They kept some of the cool old Victorian buildings (As I remember the Gorilla exhibit of my childhood is now an educational office. Hmmm) and expanded into the existing park, but also expanded to areas outside the city and they do species restoration. The educational importance of a zoo cannot be overemphasised (especially in American where various idiots refuse to believe in science). You cannot stress the value of animals for teaching enough (I do think the health and happiness of the animals must be considered, but those leopards in the zoo (and the cart covered with contraband leopard pelt items) have probably saved the lives of more leopards in the wild than many a magazine article.