A lot of very cool stuff in Italy.
Plus the food. :’) I’d want to spend a few months wandering around the Aegean, Greece, and Turkey, preferably in a small group for safety (but everyone would have to be on the same page, no retro-disco-loving freaks who want every night in glitter-ball clubs in Bodrum), but wind up in Italy. There are lots of nice ruins in Sicily and southern Italy, and the Renaissance stuff in Tuscany, and a little of everything in the Piedmont.