A large chunk of the Parc de la Ciutadella is taken up with the city's well-matured zoo, whose age is softened by its attractive garden setting. Many of the enclosures are barless and the animals are kept in place via a moat. This seems humane until you realize how little running space the animals have on their "islands." Although it has its share of lions, hippos, bears, and primates, the greatest fun here for kids of all ages is provided by the dolphin show, in which these aquatically acrobatic mammals are put through their paces by enthusiastic trainers.