A visit to Pompeii is an unforgetable experience. The history is remarkable
and if you have a good guide he can make the city come alive for you.
While you're down there you might also want to take the catamarran over
to the Isle of Capri and take the little boats that take you into the
caves of the Blue Lagoon. We did this all in one day out of Rome, but
overnight would be better.