Madrid's largest festival, the Fiesta de San Isidro offers the chance to don traditional castizo finery and feast on delicacies such as thick steamy broth. Soak up flamenco, zarzuelas and Latin rhythms at concerts all over the city. The festival is launched with a grand procession of giants and cabezudos, followed by an opening speech in the Plaza Mayor. Over the next few days, entertainment and revelry takes over the city's public spaces.