Well, speaking for myself my favorite place on Earth is probably in front of the Pantheon. There’s something majestic in the simplicity of the legend M AGRIPPA L F COS TERTIVM FECIT (although of course Hadrian and not Agrippa was responsible for the masterpiece we have today) that speaks through the ages more than any other Roman monument. I’m not terribly keen on all this modern stuff put up after 285 AD though.