There is a reason why they call Rome "The Eternal City". It feels like you have travelled back in time to the Roman empire. Ruins are scattered across the city and you can stumble upon pieces of them wherever you go. Despite the grandeur of the city with numerous major landmarks, we didn't enjoy Rome as much as Florence or Venice partly because Rome was just too hot. It was 37 degrees on the afternoon we arrived.
Athens was the start of our 18 day honeymoon, so you can say that it was here that we were first welcomed by Europe's summer heat (almost at its peak), and were we not ready for it! Still, countless reapplications of sunblock later, I must say it was pretty surreal, standing on the Acropolis and seeing the Parthenon in front of our eyes, learning about the layers of history that exist between these marbled rocks.