Fodor's Expert Review Zoo-Aquarium
Madrid's zoo-aquarium houses one of Europe's largest variety of animals (including rarities such as an albino tiger) that are grouped according to their geographical origin. It also has a dolphinarium and a wild bird sanctuary that hold entertaining exhibitions twice a day on weekdays and more often on weekends—check times on arrival and show up early to get a good seat. Although the nearest metro stop is Casa de Campo, it's best reached via the Príncipe Pío stop, then Bus No. 33.