Viking Ocean Cruises was birthed out of requests from loyal passengers who loved their experiences on Viking River Cruises itineraries. They wished the company would replicate the onboard experience, Scandinavian design sensibility and emphasis on destination immersion that's found aboard the line's riverboats and translate that to an oceangoing cruise line. Viking Ocean Cruises began sailing in 2015, and in that short span of time it has gained kudos from past river cruise passengers and traditional ocean cruisers alike.

The line's ships are sleek and modern, and sail to some of the world's most interesting ports of call. A focus on the destination at hand means that Viking Ocean Cruises stay longer in port -- and often even overnight -- so passengers can get a true taste of the locality. As a tip of the hat to its river cruise roots, the line offers a choice of included tours in every port (though there are for-fee options available as well). Itineraries range from eight-night voyages to cruises of more than a month. On the flip side, onboard daytime and evening entertainment options are limited.

While Viking isn't branding itself as a complete luxury experience, you'll find plenty to love about the cruise fare, which includes transfers, complimentary wine and beer at lunch and dinner, no-fee specialty restaurants and free unlimited Internet.

Who Sails the Ship: Viking originally targeted well-traveled passengers ages 50 and older who were value-oriented. While you'll still find plenty of older but adventurous travelers on Viking Star, it also draws a younger crowd that appreciates itineraries that emphasize the destination over sea days, and the amazing Nordic-style spa that's complete with a refreshing snow grotto. The line does not cater to families, and does not welcome children younger than 18.

Other Ships in the Fleet: All of Viking's ships are nearly identical, including Viking Sea, Viking Sky, Viking Sun and Viking Orion. Many more sister ships are on order.