Iguaçu Park is one of Curitiba's large peripheral green spaces, known especially for the city zoo within its grounds. It is a family-oriented outing rather than one of the city's architectural showpieces, with lakes, paths, and open areas that make it useful when you need space.
The zoo and park are most worthwhile for travellers with children or extra time in Curitiba. If your schedule is tight, the Botanical Garden, Tanguá Park, and Ópera de Arame are stronger first choices; Iguaçu Park adds a more local, low-key day outdoors.