Anonymous wrote:If the Olympics are in Paris you should avoid - it will be swamped with workers, vendors, people there early to do a bit of sight seeing prior to the games. Plus Parisian security is nuts. I was there one summer when a dignitary was driving through and there were snipers on the roofs. No kidding.
Also trains do stink in Italy and they are worse in Greece. To the PP who thinks they don't, I'm European and have taken more trains than I care to remember. You are probably right about Spain however, where I've never needed to take a train, so cannot comment.
The Italian train system has been significantly modernized and improved in the last 15-20 years. The mainline routes between the major cities are operated by high speed, modern 300km/hr trains that are the same as the French TGV trains. Those are what most tourists will ride.most of the time. You may need to take a 45 minutes final ride on an old school regional train for a coastal route or say from Milan up to Lake Como. But anything in the spine from Naples up to Milan (and branching from Florence to Venice), and across from Turin to Venice see frequent fast and comfortable service. Scroll down halfway through this to see the train types and pictures.
https://www.seat61.com/train-travel-in-italy.htm
It may be surprising, but Italy has many more miles of true high speed track than Germany, whose system is extensive but quite old and not especially fast (compared to true high speed 185 mph trains), and recently prone to many delays and cancellations.