If your trip to Opera is all booked but your itinerary is looking a little empty, we can give you a helping hand.A look at a postcard stand will tell you that a trip to Opera is not complete without going to Cathedral of Milan. As the most famous attraction in the city, you might want to schedule more time here than a quick stop.Explore the best of what this place has to offer by adding Basilica di Sant'Eustorgio and Museo del Duomo to your must-see list. If you have some extra time, take a look at Piazza del Duomo and Basilica di Sant'Ambrogio as well.Not far from the heart of the city, Centro Commerciale Fiordaliso is one spot you might like to put on your must-see list. Chiaravalle Abbey and Scalo Milano are also nearby and worth checking out.