Borghese Gallery is awesome, you need to get tickets in advance
Baths of Diocletian
Day trip to Pompeii and Naples
All the food er had was great, but
Vecchia Roma stick in my memory. It was a place around the corner from our apartment that would not let us in the first night since we did not have reservations. We had lunch there the following day and were blown away.
Pro Tip- always order the carafe of house vino