You're lucky--I was in Italy in '89, and both the Lamborghini and Ferrari factories were closed to visitors because they were deep into developing the Lamborghini and F40, respectively. I did, however, take a fairly extensive visit of the Maserati factory, which was really neat.
Last year, my lead technician and I were flown over to the Qvale factory in Modena to install Vortech superchargers on a couple of their Mangustas for durability testing. Talk about impressive! You never realize how much money and know-how goes into building a first-class car production operation until you see it in person. Too bad the Mangustas weren't successful. (They could have done a bit better job in the styling department...) The factory was recently purchased by MG to start making their line of small sports cars.
Have fun at Lamborghini! The town is beautiful. Stop by Modena, too, to check out Ferrari!