It's an easy boat ride over to Sarande, the Albanian port opposite Corfu. It doesn't cost much - twenty quid or so, I seem to remember (did it 2 years ago, albeit in the other direction). Quite an interesting town, lively at night along the much tarted-up prom, though much spoiled in the last twenty years by monstrous development spreading out in all directions. There's an old fortress up above the town, but you'd probably need a taxi to get you there (and if you're visiting Albania, a car ride is an essential white knuckle ride!).