Flying into Treviso.
Venice for 3 nights - opera, food, island visit to Murano!
Then train to Rimini (any suggestions - things to do/see).
Bus to San Marino for a day (any suggestions). Back to Rimini......
Then trains to Naples for 4 days to visit Pompeii, Herculaneum and to climb Vesuvius.
Between Rimini / Bologna and Naples, any suggestions for seaside towns on the Med for a few days?
Have been to Rome, Florence, Lucca, Pisa and Pietrasanta plenty of times already.
Not crazy about Sorrento, Positano or Capri.
All by public transport - trains and buses - not renting a car.