Have real life routes mapped. For example, a route that starts from southern Italy, goes through Austira, then moves on to Germany and France to end up in Spain. Ok that might be an overkill but think the fun factor of mapping with as much detail real life routes like that. It would be what the Ring is now but 100 times much more fun. I think something like that will be done after 5-10 years when our PCs will be able to handle that kind of load.