Historical sites in Northern Italy?
I know there are countless sites to visit, which is part of my problem. I've got about 4 days to fill on my trip in Northern Italy. I'll be in Genoa and have to be in Milan 5 days later but I don't mind traveling to see something incredible. Any suggestions? I have been to Venice and Florence before. Seeing the Sacra di San Michele earlier in the trip and the Last Supper before I leave Milan to give you an idea of the kind of places I find interesting. Looking for any and all suggestions. If you loved it, let me know. Thanks. Sorry if this is not the right forum for this kind of solicitation.