Viking

Viking, arguably the most well-known river cruise provider, advertises its "longships," which include spacious rooms and appealing verandas for al fresco dining. Customers appreciate Viking's destination-focused meals, as well as the selection of accommodations and itineraries available at different pricing points. The 10-day "Portugal's River of Gold" trip by Viking starts in Lisbon with a walking tour through its historic neighborhoods before continuing to Porto, the birthplace of the nation's traditional wine, to board the ship and start the Douro River voyage. On day six, travelers will reach Salamanca, Spain, a World Heritage site, where they may take in the Baroque buildings, vineyards, and beautiful surroundings along the road. Before heading back to Porto, the schedule includes stops in Portuguese communities in Pinho and Régua where visitors can enjoy the cuisine and wine.

The award-winning fleet of Viking Longships sails Europe's illustrious rivers, offering a selection of cabin categories and real two-room suites with full-size verandas. There is a restaurant, bar, lounge, library, and a sizable sun deck among the onboard amenities. The ships have a cutting-edge indoor/outdoor Aquavit Terrace where guests may dine al fresco, exquisite Scandinavian architecture, and environmentally friendly amenities like solar panels, an onboard organic herb garden, and energy-efficient hybrid engines for an incredibly comfortable journey. Itineraries on Europe's Rhine, Main, Danube, Seine, Rhône, Douro, Moselle, Elbe, Dordogne, Garonne, and Gironde Rivers are included in 8 to 23-day river cruises. Viking also provides trips down the Mekong River in Southeast Asia and the Nile River in Egypt.