For many cruise enthusiasts, a world voyage is the ultimate journey. World Cruises typically depart in January and last approximately 100 nights, though there are some World Cruises that are longer or depart later in the year. They are available in their entirety, or in segments of about 15 to 90 nights. Most of these cruises may not actually sail around the world, but they do manage to visit an astonishing array of exotic and far off locations.