You have the luxury of easy access to Europe. I have had the fortune of a family to live with in Italy so as a teen I could spend summer months living there. You and I both know how much there is to see. For me, it took almost a full day just to see the Tower of London nevermind the rest of the city. I think many tourist think they have seen a city, or country, only because they don't know all there truly is to see. Then there is the whole other issue of the opportunity to interact with the local folks of a region which, for me, is just as important as the sites. A cruise just doesn't cut it for me.