Zoo Aquarium de Madrid is the city's major zoo and aquarium, set in Casa de Campo west of the centre. It combines the usual large-animal exhibits with an aquarium, dolphin shows, bird displays, and family-friendly animal encounters.
It is a straightforward choice for travellers with children or anyone who wants a quieter day outside Madrid's museum core. Allow several hours, as the grounds are large and the site is not in the middle of the city.