During two days in Croatia, be sure to try the famous Adriatic oysters and the excellent local wines while exploring the walled Old Towns of Zadar and Dubrovnik — each city also has their own unique culinary specialties. Then sail into Montenegro’s impossibly scenic waterways embraced by forested cliffs before continuing to the Tyrrhenian Sea, where you can dine on gnocchi and sip limoncello in Sorrento.