As of 2026, Royal Caribbean International holds the title for operating the largest cruise ships in the world. Their "Icon Class" and "Oasis Class" vessels have consistently broken records for size, gross tonnage, and passenger capacity. The current reigning champion is the Icon of the Seas, which has a gross tonnage of approximately 250,800 and can accommodate over 7,600 guests at maximum capacity. These ships are essentially floating cities, featuring record-breaking amenities such as the world's largest waterpark at sea, multiple neighborhoods, "Central Park" (a living garden with thousands of real plants), and massive theaters. While other lines like Carnival or MSC operate very large ships, Royal Caribbean has made "the biggest" a central part of its brand identity, focusing on "megaships" that offer an overwhelming variety of dining, entertainment, and thrill-seeking activities. For travelers, being on the "biggest" ship means having unparalleled options, though it also means navigating a vast environment alongside thousands of other passengers, which is why the ship is designed with "neighborhoods" to help distribute the crowds and maintain a manageable flow.