I will be going on vacation to Italy in late March and April. I am trying to plan my trip, as I'm not yet entriely sure what cities to visit. Lot's of webpages mention regional trains, saying they stop at most towns of any importance in their way between major cities. I would like to know where these trains stop so I can maybe choose to say in one of the towns for a few days. However, I can't find any actual routes or itineraries.

I will arrive in Rome, and I know that I want to visit at least Venice, Florence and Bergamo.