Northern Europe from Copenhagen

Mackinac Island is a car-free Victorian treasure in Michigan's Lake Huron, where horse-drawn carriages, the iconic Grand Hotel, and century-old fudge shops preserve an atmosphere of unhurried elegance. Visitors should not miss a carriage tour past Arch Rock and Fort Mackinac, followed by planked whitefish at a harborside tavern. The island is most enchanting from mid-June through September, when the Lilac Festival gives way to warm summer days perfect for cycling the eight-mile shoreline loop.

Karlskrona is a UNESCO-listed Baroque naval city built on islands in Sweden's Blekinge archipelago, featuring one of Europe's finest maritime museums, intact eighteenth-century fortifications, and a 1,600-island archipelago. Must-dos include the Naval Museum's submarine tour, the Kungsholmen fortress boat trip, and summer crayfish feasts. June through August offers the warmest weather and longest days for island exploration.

Warnemünde is a beguiling Baltic seaside town at the mouth of the Warnow — at once a historic fishing port documented since 1195, an East German nostalgic resort beloved for its endless sandy beach and candy-striped lighthouse, and the maritime gateway to the proud Hanseatic city of Rostock just minutes away. The broad promenade, traditional Strandkörbe wicker beach chairs, and lively harbor-front fish restaurants give the town an unhurried, timeless character quite distinct from Germany's busier North Sea resorts. Summer is the prime season, when the Baltic's mild waters warm for swimming and the Rostock sailing regatta brings vibrant nautical pageantry to the harbor.

Rotterdam, Europe's largest port, is a city that rebuilt itself from wartime ruin into one of the continent's most exhilarating architectural laboratories — a skyline of Cube Houses, the pencil-thin Westerkade skyscrapers, and the breathtaking Markthal arching over an indoor food market of extraordinary abundance. The Boijmans Van Beuningen collection ranks among Europe's finest, while the art district of Witte de With pulses with galleries and design studios. Day-trip to Kinderdijk's nineteen iconic windmills, a UNESCO World Heritage site rising from the polders just south of the city. Spring and early summer offer the finest conditions.

La Rochelle is a historic French Atlantic port city renowned for its medieval tower-flanked harbour, Renaissance arcaded streets, and proximity to the elegant Île de Ré. Visit from April through October to explore world-class museums, cycle the island's salt marshes and oyster villages, and dine on some of France's finest seafood.

Bilbao is the Basque Country's cultural capital, where Frank Gehry's iconic Guggenheim Museum anchors a city transformed from industrial port to world-class destination. Visitors should not miss the pintxo bars of the Casco Viejo and the extraordinary Michelin-starred dining scene, alongside the museum's titanium splendor. The ideal months to visit are May through October, when mild Atlantic weather bathes the city in soft light perfect for exploring its riverside promenades and nearby Rioja wine country.

Leixões is the cruise port for Porto — UNESCO's dramatic river city where 20,000 azulejo tiles line a railway station, port wine lodges offer centuries of vintage tastings, and the Ribeira district cascades to the Douro in granite-and-tile splendor. Visit June via Celebrity or Ambassador Cruise Line for the São João festival and authentic Porto character.

Santiago de Compostela, renowned for its historic cathedral and vibrant pilgrimage culture, is a port city steeped in rich traditions. Must-try experiences include savoring “pulpo a la gallega” and exploring the Mercado de Abastos for local delicacies. The best season to visit is spring, when the city’s festivals and natural beauty come alive.

Union Island, the southernmost gem in Saint Vincent and the Grenadines, rises from the Caribbean as a volcanic sentinel that generations of sailors have used as a landmark on the passage to the Grenadines — its Twin Peaks offering spectacular hikes rewarded with panoramas across a tapestry of cays, reefs, and indigo water. The island serves as the yachting hub of the southern Grenadines, with Clifton Harbour bustling with sloops bound for Tobago Cays, Palm Island, and Carriacou. The dry season from December through May delivers the Caribbean's finest sailing conditions and crystal-clear visibility for diving the thriving coral gardens.

La Superba — 'the Proud' — earned its epithet as one of the four great maritime republics of medieval Italy, and Genoa's UNESCO-listed Palazzi dei Rolli, some of the finest Renaissance and Baroque palaces in Europe, still announce the city's historic ambitions with magnificent authority. Renzo Piano's revitalised old port introduces a modern chapter alongside the medieval carruggi, the labyrinthine alleys where the city's true character breathes: Ligurian focaccia straight from the wood oven, pesto ground to ancient recipes, and farinata — chickpea flatbread — served on marble counters since the twelfth century. Spring and autumn offer the most pleasant conditions for exploring this underestimated city.

Union Island, the southernmost gem in Saint Vincent and the Grenadines, rises from the Caribbean as a volcanic sentinel that generations of sailors have used as a landmark on the passage to the Grenadines — its Twin Peaks offering spectacular hikes rewarded with panoramas across a tapestry of cays, reefs, and indigo water. The island serves as the yachting hub of the southern Grenadines, with Clifton Harbour bustling with sloops bound for Tobago Cays, Palm Island, and Carriacou. The dry season from December through May delivers the Caribbean's finest sailing conditions and crystal-clear visibility for diving the thriving coral gardens.

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.