Dublin - Leixoes (Porto)

Liverpool, an historic port city, is renowned for its unique blend of vibrant culture and rich maritime heritage. Must-do experiences include sampling authentic Scouse and exploring the Three Graces along the waterfront. The best season to visit is during the mild summer months, when festivals and events enliven the city’s atmosphere.

Belfast, Northern Ireland’s capital, is a vibrant port city renowned for its rich shipbuilding heritage, highlighted by the Titanic Belfast museum. Must-do experiences include exploring the historic Cathedral Quarter and tasting traditional dishes like Irish stew and soda bread at St. George's Market. The best season to visit is during the spring and summer when the city comes alive with festivals and outdoor events.

Rathlin Island is Northern Ireland's only inhabited offshore island, home to 150 residents and spectacular RSPB seabird cliffs where puffins, razorbills, and guillemots nest by the thousands. Visitors should watch the seabird colonies from the West Light viewpoint, explore Robert the Bruce's legendary cave, and enjoy a pint at McCuaig's island pub. May through August offers active seabird colonies and wildflower-covered meadows.

Killybegs is Ireland's premier fishing port on the wild Atlantic coast of County Donegal, gateway to the magnificent Slieve League sea cliffs and pristine Gaeltacht landscapes. Visit from May through September for dramatic coastal walks, traditional Irish music, and some of the finest seafood on the island.

Dingle is a tiny harbour town on the westernmost tip of Ireland's Kerry coast, where 2,000 archaeological sites, traditional music sessions in 52 pubs, and some of Ireland's finest seafood create the quintessential Atlantic Irish experience. Must-dos include Slea Head Drive's coastal scenery, the 1,300-year-old Gallarus Oratory, and an evening of traditional music in a Dingle pub. Visit June for longest days, wildflowers, and the best weather on the Atlantic coast.

Cork (via Cobh cruise port) offers Ireland's largest natural harbor, the last port of call for the Titanic, and access to Ireland's culinary capital with its legendary English Market and artisan food culture. Must-dos include visiting the Cobh Heritage Centre, shopping the English Market for artisan cheeses, and day-tripping to gourmet Kinsale. Visit May to September for the warmest weather and longest days.

Saint Mary's, Isles of Scilly in United Kingdom blends maritime heritage, dramatic coastal scenery, and the understated warmth of the British Isles into a deeply rewarding port of call. Essential experiences include walking the coastal paths and sampling the region's thriving artisanal food scene. The most reliable conditions arrive May through October, when the climate is at its most welcoming for outdoor exploration, though the atmosphere is compelling in any weather. Cruise lines including Ponant feature this port on their most compelling itineraries. Whether you have a few hours or a full day, the port rewards exploration at every pace and in every direction.

Gijón is a refined Atlantic port city on Spain's Asturian coast, where a three-thousand-year history, a celebrated cider and culinary culture, and the dramatic headland quarter of Cimadevilla converge to create one of Iberia's most compelling yet uncrowded cruise destinations. Visitors should not miss the traditional cider houses of Cimadevilla and a day trip to the Picos de Europa via Cangas de Onís. The finest months to visit are May through September, when long coastal evenings and mild Cantabrian weather reveal the city at its luminous best.

La Coruña, the Atlantic gateway to Spain's verdant Galicia region, is home to the Tower of Hercules — the world's oldest functioning Roman lighthouse and a UNESCO World Heritage Site — and a waterfront of luminous glass galleries unlike anything else in Europe. Visitors should not miss savouring pulpo á feira and wild percebes at the local markets, nor the short journey to Santiago de Compostela along the Camino. Late spring through early autumn offers the mildest weather, with September providing warm days, golden light, and fewer crowds along the granite streets of the Ciudad Vieja.

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.