On a budget, weigh it — Zoo Miami isn't cheap for what it is.
~$23 adult
A strong family day — one of the country's larger zoos, cageless habitats, a monorail, and tropical species suited to the climate. The catch: it's far south (well outside the city), vast, and brutally hot with little shade — a summer midday visit is punishing, and you'll want to rent a tram or cart.