Oceania Marina: 21-Night Mediterranean from Barcelona

Barcelona cruise port is the busiest in the Mediterranean, handling millions of passengers a year across multiple terminals. The city behind it earns that traffic.

Built on a narrow strip of land between the Mediterranean and the Etang de Thau lagoon, Sete is a working fishing port of about 45,000 people on the Languedoc coast. The city calls itself the Venice of Languedoc for its network of canals, though the comparison undersells what makes Sete different: this is a genuine fishing town where trawlers unload the catch at the port each morning and the restaurants cook what came in that day.

Marseille cruise port is France's busiest and one of the major stops on western Mediterranean itineraries. The city is France's second largest and its oldest, founded by Greek sailors over 2,600 years ago, and it has a rougher, more authentic edge than the polished Riviera towns further east.

Monaco is a sovereign city-state on the French Riviera, just 2 square kilometers in size with about 39,000 residents, making it the second-smallest country in the world. Monte Carlo, its most famous district, is synonymous with wealth, casinos, and Formula 1 racing.

Florence (Livorno) cruise port is the main Tuscan stop on Mediterranean itineraries, but it's worth being clear about what you're actually docking at. The port is Livorno, a working industrial city on the Ligurian coast, about 85 kilometers west of Florence.

Rome's cruise port is in Civitavecchia, a working port town about 80 kilometers northwest of the city. That distance is the single most important thing to understand about this stop.

Santorini cruise port is one of the most visually striking arrivals in cruising. Ships anchor in the flooded caldera of a volcanic crater, with the whitewashed villages of Fira and Oia perched dramatically 1,000 feet above on the cliff edge.

Kusadasi cruise port is Turkey's busiest and the primary gateway to Ephesus, one of the most significant ancient Greek and Roman cities in the world. The port sits on Turkey's central Aegean coast, about 95 kilometers south of Izmir, with ships docking at the Ege Ports cruise terminal right in the middle of town.

Athens cruise port is in Piraeus, a busy port city about 10 kilometers southwest of central Athens. Piraeus is its own city, not just a terminal, and it handles cruise ships, island ferries, and commercial traffic all at once.

Rhodes is the largest of Greece's Dodecanese islands, sitting in the far southeastern Aegean Sea just 18 kilometers from the Turkish coast. The Rhodes cruise port is in the city of Rhodes on the island's northern tip, where ships dock right next to one of the best-preserved medieval old towns in Europe.

Istanbul cruise port is one of the most extraordinary arrivals in the world. Ships sail up the Bosphorus Strait between Europe and Asia, past Ottoman palaces and Byzantine ruins, and dock at Galataport, the underground cruise terminal in the Karaköy neighborhood right in the center of the city.