A cruise is a vacation taken on a large ship that travels to various destinations, often including multiple ports. Passengers enjoy a range of amenities, such as restaurants, pools, and entertainment, while traveling on the open sea. Cruises can last from a few days to several weeks and are popular for their all-inclusive nature. Many cruise lines, like Carnival and Royal Caribbean, offer themed cruises, catering to different interests such as family vacations, romantic getaways, or adventure trips. Travelers can explore new cities and cultures during port stops, making cruises a convenient way to see multiple destinations in one trip.