Eco Parque is a water park set in restored Atlantic Forest just inland from the beach road. It has the usual collection of slides and wave pools, but what sets it apart is the setting — the tallest slides drop from platforms built into the trees, and the lazy river winds past stands of native vegetation rather than concrete.
It's a reliable rainy-afternoon backup and a hit with children, but adults with a tolerance for theme parks tend to enjoy it too. The park runs daily during high season and weekends-only at quieter times of year. Bring sunscreen and your own snacks if you want to keep costs down.