Carnival Corporation operates as a cruise and vacation company. As a single economic entity, Carnival Corporation & Carnival plc forms the largest cruise operator in the world. Carnival is the world's leading leisure travel firm and carries nearly half of the global cruise guests. The company has operations on North America, Australia, Europe and Asia. The company's cruise brand includes s Carnival Cruise Line, Princess Cruises, Holland America Line, Seabourn, P&O Cruises (Australia), Costa Cruises, AIDA Cruises, P&O Cruises (UK) and Cunard.