Heritage is a big theme on Cunard Line's three Bermuda-flagged ships. The biggest, the 2,600-passenger Queen Mary 2, was "remastered" in 2016 after more than 10 years in service, with a more contemporary interpretation of art deco design in its suites and the addition of 15 solo cabins and 30 Britannia Club rooms. Cunard, which has ordered a fourth ship for 2022, is a brand of Carnival Corp.