One of the highlights of a trip to Rome for me was the Pantheon, because it is a window into how those buildings looked in their prime, before they were ruined. It's the same for me when I see perfectly preserved objects from the ancient world.
I loved Rome. My daughter was over there on a school trip last summer (she’s an interior design and architecture student), and I was pleased to see she saw almost exactly the same sights as I did, including Hadrian’s Villa on the outskirts.