You don't have to be king of the world to travel on these queens of the seas. A venerable name in ocean travel, Cunard Line is the last surviving operator of scheduled luxury ocean liner service. Its fleet consists of Queen Mary 2 (2,592 berths) and Queen Victoria (1,980 berths). Cunard will add Queen Elizabeth (2,058 berths) to its fleet in 2010. The Cunard vessels offer transatlantic service between the UK and the US, as well as cruises in the Asia/Pacific region, the Caribbean, Europe, and around the world. Most of its passengers come from Australia, Germany, North America, and the UK. Founded in 1839, Cunard is part of #1 cruise ship operator Carnival.