The Pelješac peninsula is one of the great red-wine regions of the Mediterranean, the home of Plavac Mali — a thick-skinned grape that produces some of Croatia's most ambitious wines. From Komarna, an hour's drive across the bridge brings you to the central wine villages of Potomje, Trstenik, and Janjina.
The classic loop takes in three or four cellars in a day. Saints Hills, Korta Katarina, Miloš, and Matuško are reliable larger producers with proper tasting rooms; smaller family wineries cluster around Potomje and welcome drop-ins. The Dingač tunnel, blasted through the mountain in 1979 to give the Dingač vineyard road access, is worth the detour for its own sake.