Visited the Castle and saw the great views from the parapets. Then visited the old bullring after an obligatory visit to a pearl factory. Then walked around the old quarter and visited the Cathedral. Interesting and informative guide.
This was pre-booked and the tour guide told us about the sights and gave us, typically, one hour to view them independently. We could combine a number so had an opportunity to visit the Trevi Fountain; St Peter's Basilica; Spanish Steps; Colosseum; Pantheon; and Piazza Navona. Great value at 25 euros.