Marvelous Cinque Terre with the 5 Villages; Riomaggiore, Manarola, Comiglia, Vernazza & Monterosso.
I took a boat from Portovenere to Riomaggiore, walked from there to Manarola, then Comiglia. Took the train from there to Vernazza, and the boat from there to Monterosso. Then the boat back to Portovenere. All in one day, but could have stayed for a week happily.