Travel to Italy

[gettysburgfreak]

I am headed to Italy on Sunday for my honeymoon and was wondering if anyone has travel advice on what to see or not see and ways to avoid sticking out like a sore thumb. I have never traveled outside of the US and Canada before.

I am going to Venice, Florence, Rome, Cinque Terre/Riomaggiore, Naples, Palermo, and Agrigento in Sicily.

I saw the post about smoke shops in Rome but any other spots I should try and get to?

Thanks