The four streets forming Milan's luxury fashion district: Via Montenapoleone, Via della Spiga, Via Sant'Andrea, and Via Manzoni. This is where every major Italian and international fashion house has its flagship — Gucci, Prada, Versace, Armani. Window shopping is free and the neighbourhood itself, with its 19th-century palazzi and courtyard gardens, is worth walking through even for those indifferent to fashion.
Best visited on a weekday morning when it's quieter. The Museo Poldi Pezzoli on Via Manzoni — a private art collection inside a 19th-century palazzo — is a worthwhile stop nearby.