Take a stroll through the place which used to serve as a washing area. Women would gather around and wash clothes while chatting with each other. The slabs which they used in the process are still there. This place is very atmospheric and makes you see a little bit of how the old Milan lifestyle would look like.
Always open.
More info at Milan Tourism http://www.tourism.milan.it/wps/portal/?WCM_GLOBAL_CONTEXT=/wps/wcm/connect/en/situr/home/miperte/numeriserviziutili/altriluoghi/loc3708
Address 2B Vicolo Privato Lavandai, Milano 20144, Italy
Coordinates 45°27'8.185" N 9°10'28.919" E
