The first classical move will start to take a photo in front of it then you’ll head to inside the cathedral to visit it. Moreover you also have the opportunity to go up to this fabulous monument in order to have a closer look to the fascinating decorations and to have an upper look to the flat city. There are even events on the top of the Duomo sometimes, if you are lucky you can catch one of them!
Having the biggest square in the town in front of it, it hosts several organizations and event during the whole year. The whole life in this town starts from this point! It is in the center and we can say that all the other spots are located according to it. You can reach there with the metro (green and yellow lines) or with the tram.
If you would like to learn more about it, check the website!