Often called the gateway to Europe, the port city of Rotterdam is full of old-world charm. The harbor offers amazing views and a maze of wharves and canals, along with towering spires make for a beautiful sight. Take a stroll and duck into one of the pubs or eateries along the way. Only three pre World War II buildings in the city centre have survived and are worth a look – city hall, St. Laurence church and the White House. Explore the Museum Boymans van Beuningen, which houses a unique collection dating from the 14th century, or the Museum Voor Volkenkunde – home to ethnological exhibits. Exquisite architecture can be seen in many areas of Rotterdam, most notably in the Delfshaven quarter of the city – where 18th century houses are on display. For a laugh, check out Kijk-Kubus, an upside-down house.

From this busy port city tour to canal-laced Brugge; Brussels, home of the European Union; and Ghent, mecca for chocolate lovers. Sample shore excursion: Antwerp, City of Diamonds.

In the 20th century, Cherbourg’s biggest claim to fame was perhaps that it had been a vital port during the Allied forces’ D-Day invasion, which landed to the southeast and traveled overland to capture the well-defended city from the Germans. However, in recent years, Cherbourg has undergone a revitalization that makes it a great place to sample local delicacies in the Place de Gaulle Market and calvados (apple brandy) from nearby orchards, plus visit the historic sites in and near town. Can’t-miss attractions include the wonderful Cité de la Mer maritime museum, as well as the Roule Fort where the Americans ousted the Germans, now home to the Museum of the Liberation. Cherbourg is also a perfect jumping off point for exploring the sights of Normandy, like the D-Day landing locations on Utah and Omaha Beaches, the historic town of Bayeux—the base of William the Conqueror before he invaded England—and the stunning scenery and sea cliffs of the Cape of La Hague.

From lovely Oporto enjoy a leisurely drive along the Rio d‘Ouro (River of Gold) into port wine country. Hear the fascinating story of its origin; taste test the season‘s best.

Find your way in the city that launched the Age of Discovery. Cross the River Tagus on its soaring suspension bridge, watched over by a colossal statue of Christ. Wander the maze of streets in the Alfama, the old Moorish quarter, dominated by the medieval Castle of St George where peacocks strut and shriek. Stroll the Baixa and refuse to leave without a pair of elegant shoes.

Hanging off the southwestern edge of Spain, Cádiz is one of Andalucía’s regional capitals and a place bursting with personality. Europe’s oldest continually inhabited city, with a history stretching back 3,000 years, has fallen on hard times in recent years, but a combination of pride, good humor and stoicism keeps it on an even keel. The famous Carnival, one of Spain’s most important in the genre, is a thrilling fiesta into which Cádiz pours all its energy and ingenuity. The city’s fond nickname, la tacita de plata (“little silver cup”), alludes to its curious geography—it juts out on a long peninsula into a sheltered bay. Old town Cádiz is a warren of cobbled streets where the houses, painted white or dusty ochre, have the weather-beaten look of a place subjected to centuries of wind and salt. This ancient city has one good example of everything that matters: a great food market, a theater (the Teatro Falla, a grand Art Nouveau Moorish gem), a gorgeous cathedral, impressive fortifications and a beach—the picturesque and famous La Caleta.

This strategic link between the Atlantic and the Mediterranean has been ruled by the Spanish, British and Moors. As long as the Barbary Apes remain, the British will rule Gibraltar this is the tradition that has held for 350 years. These pesky primates are a favorite with visitors despite their incessant chatter and light-fingered ways. Ride to the top of the Rock for great views over the Strait of Gibraltar-on a clear day you‘ll see Africa.

Floating gemlike off Spain‘s Mediterranean Riviera, these islands offer you pearls, pottery and perfectly sublime sandy beaches. Visit Valldemosa, where George Sand and Frederic Chopin spent a romantic winter in 1838.

Messina‘s astrological clock is as much a man-made masterpiece as the road leading to Taormina, which canitlevers out of the rocky cliff face and stands on impossibly tall pylons. Leave it to the Italians to design a road that‘s both a thrill-ride and a feat of engineering! Once you‘re safely in Taormina, walk to the sublime Greco-Roman theatre that overlooks Naxos Bay and snow-capped Mt Etna, and spend some time on the Corso Umberto with a gelato firmly in hand.

Rising behind the wide curve of its bay with brooding Mount Vesuvius and the deep blue sea as a backdrop, Naples, Italy enjoys a magnificent natural setting. It is the third-largest city in Italy after Rome and Milan, and arguably the most colorful and seductive of them all: Splendor and squalor live side by side in 21st-century Naples, and the mix is intoxicating. Cruise to Naples, home to world-class museums and attractions. Naples has something for everyone – superb restaurants, eclectic shopping, a thriving contemporary art scene and an edgy and vibrant street life. But once you’ve had enough of the pounding traffic and jostling crowds while sightseeing in Naples, there are endless opportunities for exploration further afield. The celebrated Roman ruins of Pompeii and Herculaneum, both victims of Vesuvius’ devastating 79 C.E. eruption, lie just south of the city. Explore Naples‘ history or take a short ride over to the island of Capri on a Naples shore excursion. The delightful town of Sorrento and the magnificent scenery of the Amalfi Coast are also within easy reach, and the dolce vita glamour of Capri—not to mention the healing thermal waters of Ischia—are a short hydrofoil hop from the mainland. Naples cruises offer a perfect mix of cultural and natural attractions.

When you embark on a cruise to Rome with Holland America Line you experience its bustling modernism along with its rich history. You can walk in the footsteps of emperors, have coffee in Renaissance piazzas and see contemporary art all in one afternoon. Your sightseeing time in Rome begins at the nearby port of Civitavecchia, a seaside town with roots that stretch back to the Etruscan era. Take note of the Forte Michelangelo (both Bramante and Michelangelo had a hand in its design), and the lungomare, a lively stretch along the sea with beach clubs, bars and restaurants. Once in the Eternal City you can fill your day with museums, churches, archaeological sites, traditional trattorias, artisan shops and, of course, gelato. The Colosseum and the Vatican Museums are Rome‘s superstar attractions, but there are plenty of quieter gems to explore. For food lovers there are the markets in Campo de‘ Fiori or the slightly farther flung Testaccio. The hip neighborhood of Monti, next to the Colosseum, has a vibrant piazza scene and boutique shopping, while the Villa Borghese offers a green oasis with a view towards Saint Peter’s Basilica and the masterpiece-filled Galleria Borghese. Although Rome might not have been built in one day, you‘ll certainly be able to see its highlights on our Rome cruises along with the top things to do there in 24 hours.