Cruise ships supported by advances in shipyard technology, the size and capacity of ships continue to increase significantly. Entering the 21st century, its development is even more extreme. Cruise ships are now able to carry more than 6,000 passengers, plus a variety of magnificent facilities such as theater halls and recreational parks. Here are some of the largest and most luxurious cruise ships; Symphony of the Seas, Harmony of the Seas, Allure of the Seas, Oasis of the Seas, Quantum of the Seas, Anthem of the Seas, Ovation of the Seas, Liberty of the Seas, Norwegian Epic, Independence of the Seas.