I'm not a fan of Milan, but there are a couple nice things to see. Hopefully the weather will be nice when you get there, but don't be too upset if it's not as it's quite well-known for its shitty weather. There's a beautiful castle (Castello Sforzesco), a pretty famous cathedral (Duomo), and a couple wonderful art galleries. You can't miss Leonardo's Last Supper in the church called Santa Maria delle Grazie, and a museum called Pinacoteca di Brera. ALSO, bring lots of money and shop, Milan is pretty good for shopping. I know you like Zara, don't you? Well, it's a LOT cheaper in Italy, so you won't be disappointed
