Carnival offers a boatload of fun. The company is the world's #1 cruise operator, boasting 10 leading cruise lines and about 100 ships with a total passenger capacity of more than 215,000. Carnival operates in North America primarily through its Princess Cruise Line, Holland America, and Seabourn luxury cruise brand, as well as its flagship Carnival Cruise Lines unit. Brands such as AIDA, P&O Cruises, Iberocruceros, and Costa Cruises offer services to passengers in Europe, and the Cunard Line runs luxury trans-Atlantic liners. Carnival operates as a dual-listed company with UK-based Carnival plc, forming a single enterprise under a unified executive team.