Yeah, why not split north Italy and south Italy then?
And Mexico, there are at least 3 main regions: Northern Mexico (with cities like Tijuana, Monterrey, Chihuahua, Juarez, etc), Central Mexico (Mexico City, Guadalajara, Leon) and Southern Mexico (Yucatan, Quintana Roo, Campeche, Chiapas, etc).
Califorina at times is like many states. Living in the Northeastern US, "California" is kind of like combining New York, Massachusetts, Connecticut, Rhode Island, Vermont, New Hampshire, and Maine into a single state.