Acropolis to Amalfi

The port that launched Athenian democracy's naval supremacy at the Battle of Salamis, Piraeus remains Greece's maritime heartbeat — and the most convenient gateway to both the Acropolis and the Aegean island chains. Dine on grilled sea bream at a Mikrolimano harbourside taverna, visit the extraordinary bronze Piraeus Apollo, and set sail for Hydra or Santorini by afternoon. Late April through June and September offer the Aegean at its most golden and uncrowded.

Mykonos is the Aegean at its most seductive — a labyrinth of bougainvillea-draped whitewashed alleys designed to disorient pirates (and occasionally visitors) leading to Kástro, the medieval hilltop quarter overlooking Little Venice, where balconied houses hang directly above the sea. The island's famous windmills, perched on a ridge above the old harbour, are best photographed at golden hour as pelicans patrol the waterfront below. Visit the sacred archaeological island of Delos — a 30-minute boat crossing — for one of the most significant ancient sites in the Greek world. May, June, and September offer the perfect balance of warmth, light, and bearable crowds.

Bozcaada Island, Turkey, Turkey is a distinctive port city where deep cultural heritage meets authentic local atmosphere, featured on itineraries by Star Clippers. Must-do experiences include walking the historic center to experience the layered architectural heritage, and seeking out the regional culinary traditions at a locally favored establishment away from the port area. The optimal time to visit is May through September, when mild temperatures and long days favor unhurried exploration.

For more than fifteen centuries, Istanbul has been the pivot upon which empires turned — Byzantium, Constantinople, the Ottoman capital — and nowhere else on earth compresses so much history into a single horizon. The Hagia Sophia, the Blue Mosque, and the Topkapi Palace form an incomparable trinity of architectural genius along the Golden Horn; the Grand Bazaar's four thousand shops offer a sensory immersion unlike any other marketplace. Must-dos include a Bosphorus sunset cruise and a meal of mezze along the waterfront at Karaköy. Spring (April–May) and autumn (September–October) offer the most gracious climate for this inexhaustible city.

Mytilene is the capital of Lesbos, Greece's third-largest island, birthplace of the poet Sappho and home to eleven million olive trees, exceptional museums, and Greece's ouzo capital at Plomari. Must-dos include visiting the Petrified Forest UNESCO Geopark, tasting PDO olive oil and local ouzo, and exploring the dual-harbor old town. April through June and September-October offer ideal weather for island exploration.

Kuşadası owes its place on the world's cruise itineraries to one extraordinary proximity: the ancient city of Ephesus, one of the greatest metropolises of the Greco-Roman world, lies just seventeen kilometres from the port. Ephesus — with its two-kilometre marble colonnade, the Library of Celsus, and the Temple of Artemis (one of the Seven Wonders of the Ancient World) — demands at least half a day of unhurried exploration. The House of the Virgin Mary, a pilgrimage site believed to be where Mary spent her final years, adds a profound spiritual dimension. Kuşadası itself is a lively Aegean resort; the season runs April through October, with May and September offering ideal temperatures and smaller crowds.

Valletta, Europe's smallest capital, is a fortress city of exceptional grandeur raised from bare limestone in just fifteen years after the Knights of St. John repelled the great Ottoman siege of 1565 — its rigid Renaissance grid of sun-drenched streets concealing a density of baroque palaces, gilded oratories, and subterranean World War II shelters unrivaled anywhere in the Mediterranean. The Grand Harbour, framed by golden bastions plunging into startlingly blue water, offers one of the most dramatically photogenic arrivals in the world for arriving vessels. Spring and autumn deliver the most comfortable temperatures for exploring this UNESCO-listed gem.

Messina guards the storied strait that separates Sicily from the Italian mainland — the passage Homer mythologised as Scylla and Charybdis — and its Norman cathedral's astronomical clock, one of the world's largest mechanical clocks, puts on a captivating automated display each noon as gilded figures enact scenes of the Resurrection. The city was catastrophically rebuilt after the 1908 earthquake, but its markets and waterfront convey the fierce energy of a Sicilian port that has witnessed two and a half millennia of Mediterranean history. Messina is the perfect gateway to Taormina, a 40-minute drive into the hills above the Ionian coast, with views of Etna at their most dramatic. Spring and autumn are ideal.

Sorrento is a clifftop jewel on southern Italy's Sorrentine Peninsula, perched sixty meters above the Bay of Naples with sweeping views of Vesuvius and Capri. Visitors should not miss the gnocchi alla sorrentina at a family-run trattoria in the old quarter, nor the short excursion along the Amalfi Coast to Positano and Ravello. The ideal season stretches from late April through mid-October, when warm Mediterranean light illuminates the tufa cliffs and the famed local lemons reach their most fragrant peak.

Rome's ancient maritime gateway since the Emperor Trajan commissioned its harbour in 106 AD, Civitavecchia is the natural prologue to the Eternal City — just seventy minutes southeast by express rail. The port's Renaissance fortress, designed in part by Michelangelo, anchors a working waterfront that has welcomed travellers for millennia. Beyond Rome's unmissable monuments, consider an afternoon in the Civitavecchia thermal baths, drawing on mineral waters prized since antiquity. Spring and autumn offer the ideal balance of mild weather and manageable crowds for exploring the capital's layered history.

Tucked at the head of a deep Ligurian harbour that Byron and Shelley named the Gulf of Poets, La Spezia serves as the ideal base for exploring the Cinque Terre — five cliff-hanging fishing villages threaded by ancient paths above a turquoise sea. The town itself rewards exploration: the Museo Amedeo Lia houses one of Italy's finest private collections of medieval and Renaissance art, and the naval museum reflects La Spezia's long maritime history. A boat excursion to Portovenere and the island of Palmaria, or a trail walk between Vernazza and Corniglia, constitutes a perfect day from port. Best visited April through June and September through October, avoiding the summer heat and peak crowds.

Monaco, Monaco is a distinctive port city where deep cultural heritage meets authentic local atmosphere, featured on itineraries by Regent Seven Seas Cruises. Must-do experiences include walking the historic center to experience the layered architectural heritage, and seeking out the regional culinary traditions at a locally favored establishment away from the port area. The optimal time to visit is May through September, when mild temperatures and long days favor unhurried exploration.

Barcelona is the city where Roman history, Gothic grandeur, and Gaudí's delirious Modernisme collide in a Mediterranean coastal capital of astonishing energy and beauty. The Sagrada Família — still under construction after 140 years — continues its audacious ascent toward completion, while the Gothic Quarter's Roman-era foundations and the Passeig de Gràcia's extraordinary concentration of Modernisme masterpieces reward days of exploration. For a complete sensory experience, lose an afternoon in the covered labyrinth of La Boqueria market before descending to the waterfront for Catalan seafood at its finest. May through June and September through October offer the most pleasant weather; the city connects directly to Paris by overnight train.