Viking Ocean Cruises is the oceangoing line by the team behind Viking River Cruises. Launched in spring 2015, the ocean cruise ships take some of the most notable aspects of the river voyages and offer them at sea. First off, the ships are more all-inclusive than their competitors, with Wi-Fi, alcohol, specialty restaurants, and some shore excursions incorporated into the fares. There are other similarities too — headphones are waiting in your cabin on arrival for use on guided city walking tours, and you'll find plenty of modern Scandinavian design details, from blonde wood to furniture with clean lines. Read our full line review.