The Lamborghini Museum is located in Sant'Agata Bolognese, in that tiny triangle between Bologna and Modena, fittingly defined as "Terra dei Motori" (Motor Valley).
Not sure where that is?
Google Maps not only shows you where to find The Lamborghini Museum, but also takes you inside the building. Oh, and you even can sit in the driver's seat. http://goo.gl/maps/2lqpc .