Second day trip that I’d like to suggest if you are visiting Milano is at Crespi d’Adda (more info can be found on this wikipedia page).
This is a ‘company town’ in a kind of ‘Ford model’, with houses for workers and employees built around the area where the industry had been established. The owner of the industry not only built houses, he concerned about recreational and social activities too.
The site is on Unesco’s list.
Unfortunately my pictures won’t be able to show how interesting is this place, maybe an upper view would be ideal, however I can ensure that a walk in this area is more than pleasant. It seems to walk breath in a recent past.