Carnival Corporation & plc operates as a leisure travel company. Its ships visit approximately 700 ports under the Carnival Cruise Line, Princess Cruises, Holland America Line, P&O Cruises (Australia), Seabourn, Costa Cruises, AIDA Cruises, P&O Cruises (UK), and Cunard brand names. The company also provides port destinations and other services, as well as owns and operates hotels, lodges, glass-domed railcars, and motor coaches. It sells its cruises primarily through travel agents and tour opera.