Fashion is big business and a big draw in Milan, from the extremely upscale stores of the Quadrilatero d'Oro to the more reasonably priced shops on Corso Buenos Aires. But there's plenty else to do and see, including the ornate Duomo cathedral, the famous La Scala opera house, art museums, galleries and elegant palazzos. Leonardo da Vinci aficionados can book a viewing of "The Last Supper" and visit the Museo Nazionale della Scienza e Tecnica to see da Vinci's technical drawings and models.