Venice, a UNESCO World Heritage city, rises from a lagoon on more than 100 small islands linked by canals. A gondola ride passes under the Rialto Bridge and along the Grand Canal. At Piazza San Marco, St. Mark's Basilica and the Doge's Palace reflect Venetian power. Art highlights include the Gallerie dell'Accademia and Peggy Guggenheim Collection. Nearby Murano is known for glassblowers, and Burano for colorful shops and lace makers.

Korčula, off Croatia's central Dalmatian coast, is a lush island of olive groves, vineyards, and pine forests. Its charming Old Town shows rich Venetian heritage, with 15th-century St. Mark's Cathedral above red-roofed Gothic and Renaissance buildings. Taste wine in Smokvica or Cara, relax on a Lumbarda beach, or kayak the Skoji islets, especially Badija's monastery. End at Massimo Bar in Korčula town, set in 15th-century Zakerjan Tower and reached only by ladder.

Dubrovnik, dubbed by Lord Byron the pearl of the Adriatic and by George Bernard Shaw a place to seek paradise on earth, is a UNESCO World Heritage city of red-tiled roofs, green hills, and the blue Adriatic. Its thick medieval walls encircle Gothic, Renaissance, and Baroque churches, monasteries, palaces, and fountains. It also featured prominently in Game of Thrones. Its ancient ramparts, surviving centuries of sieges, remain deeply inspiring.

Kotor is unforgettable: the fjord-like Bay of Kotor winds through forested mountains to a sparkling sea, with the coral-roofed UNESCO Old Town tucked into the innermost cove. Venetian ramparts enclose landmarks like the 12th-century Cathedral of St. Tryphon and the Maritime Museum. Fit visitors can climb 1,350 steps to St. John's Fortress for sweeping views; others can take a boat to Our Lady of the Rocks or visit medieval Budva.

Corfu is steeped in history and long coveted by maritime powers since antiquity. The greenest of the Greek islands, it has orange and olive groves, beautiful beaches, and a cerulean sea. Its UNESCO-listed Old Town features the Esplanade, palaces, castles, and archaeological sites. Highlights include Achillion Palace, Mon Repos, and Paleokastritsa, where Odysseus was said to wash ashore.

Parga, on the Greek mainland, has island-like charm and historic beauty. Colorful Venetian-era houses rise above a turquoise bay, with a tiny chapel on a tree-covered islet. Cobbled streets lead to a medieval castle overlooking the bay, Valtos beach, groves, and the Ionian Sea. It's also a great base for nearby Ionian islands and northwestern Greece.

Athens, cradle of Western democracy, offers a living link to antiquity. Climb the Acropolis to see the Parthenon, Temple of Nike, and Erechtheion caryatids, then visit the Acropolis Museum for original statues and artifacts. The National Archaeological Museum is also outstanding. In the Agora, follow the footsteps of Plato, Aristotle, Socrates, Hippocrates, and Pericles. Finish in Plaka with its winding lanes and lively tavernas.