1. Visit the Duomo, which is one of the most famous churches in Italy
2. Explore the Galleria Vittorio Emanuele II
3. Take a tour of Leonardo da Vinci's painting "The Last Supper"
4. Enjoy some gelato at Giacomo Cimbali or Carpigiani Gelateria Artigianale, both located in Piazza San Babila
5. Go to La Scala Theatre and watch an opera performance by Giuseppe Verdi or Amilcare Ponchielli
6. Shop on Via Montenapoleone, Milan's most famous street for fashion and luxury goods
7. Take a trip to Piazza del Duomo, where you can take pictures with Milan's iconic cathedral
8. Eat at La Scala Ristorante for authentic Italian cuisine
9. Explore Milan's ancient city walls on foot or by bike
10. Check out the Basilica di Sant'Ambrogio, which was built in 397 AD and has many beautiful mosaics inside