When In Milan

You may want to check out he Museum of Science & Technology:

"With its twenty-eight sections, from information technology to engines to astronomy, some 40 000 square metres of displays, and a massive 15 000 pieces in its collection, the "Leonardo da Vinci" National Museum of Science and Technology in Milan is one of the most important technical and scientific museums in the world. The museum is made up of three separate buildings: the Monumental Building, which is a former Olivetan monastery whose construction dates back to the early sixteenth century; the Rail Transport Building and the Air&Sea Transport Building."