In 2025, we are on the cusp of floating cities. The cruise industry has taken luxury and innovation to extraordinary levels, with some ships resembling floating cities. From world-class amenities to record-breaking sizes, the largest cruise ships in the world offer travelers of all propensities an unmatched vacation experience. Here’s a look at the top 10 largest cruise ships in the world and what makes them stand out.
Icon of the Seas
Operator: Royal Caribbean International
The Icon of the Seas reigns as the largest cruise ship in the world, with a staggering gross tonnage of over 250,000 GT and the capacity to carry more than 7,500 passengers. This mega-ship boasts revolutionary onboard features like the AquaDome, a glass-covered space that transforms from a serene daytime retreat into an immersive nighttime entertainment venue. Its seven pools cater to every mood, from tranquil infinity pools overlooking the sea to lively family splash zones. Cutting-edge entertainment includes Broadway-caliber shows, high-tech performances, and immersive activities designed to captivate guests of all ages.
Wonder of the Seas
Operator: Royal Caribbean International
As part of the Oasis-class ships, the Wonder of the Seas stands out with 18 decks of luxury. Its Central Park, an open-air garden featuring over 20,000 real plants and trees, makes for a serene, nature-inspired retreat at sea, complete with dining and live music. The largest water park at sea boasts adrenaline-pumping waterslides, splash zones for kids, and tranquil pools for adults. With a gross tonnage of 226,963 and the capacity to accommodate over 6,900 passengers, this ship ensures both space and variety for its guests. From thrilling zip lines to world-class dining experiences and entertainment, the Wonder of the Seas promises an unforgettable journey for every traveler.
Symphony of the Seas
Operator: Royal Caribbean International
The Symphony of the Seas, with a gross tonnage of 228,081 GT and a passenger capacity of up to 6,680, held the title of the largest cruise ship in the world before the Icon of the Seas launched. This maritime marvel is designed with innovative neighborhoods like the Boardwalk, a vibrant area featuring a hand-carved carousel, rock climbing walls, and even an AquaTheater for jaw-dropping aquatic performances. Its specialty dining venues include everything from upscale steakhouses to globally inspired eateries, akin to a culinary journey at sea. Families will find tailored experiences such as splash zones and escape rooms, while luxury travelers can indulge in exclusive suites, spa retreats, and private lounges, ensuring the Symphony offers a harmonious blend of adventure and relaxation.
Harmony of the Seas
Operator: Royal Caribbean International
Another Oasis-class masterpiece, the Harmony of the Seas is renowned for its Ultimate Abyss, the tallest slide at sea, which plunges thrill-seekers down 10 decks at breathtaking speeds. This colossal ship, with a gross tonnage of 226,963 and the capacity to accommodate over 6,700 passengers, is a floating paradise of innovation and luxury. Its meticulously designed neighborhoods include an outdoor Central Park with lush greenery, boutique shops, and alfresco dining. Guests can enjoy top-tier dining options, from internationally inspired cuisine to casual eateries, while adventurers can tackle zip lines, surf simulators, or even mini-golf. The Harmony seamlessly blends adrenaline-pumping excitement with tranquil retreats, offering something for every kind of traveler.
Oasis of the Seas
Operator: Royal Caribbean International
The ship that started it all, the Oasis of the Seas, set a new benchmark for cruise ships. With a gross tonnage of 226,838 GT and the capacity to host 6,780 passengers, it redefined what a cruise vacation could be. This iconic vessel introduced the concept of themed neighborhoods, such as the open-air Central Park, with over 12,000 live plants, and the bustling Royal Promenade, filled with shops, dining, and entertainment. It also boasts the first-ever zip line at sea, a thrilling experience that soars above the ship’s Boardwalk area. From its luxurious staterooms to unparalleled recreational activities, the Oasis of the Seas remains a pioneering force in the world of mega cruise ships.
MSC World Europa
Operator: MSC Cruises
The MSC World Europa is MSC Cruises’ largest and most innovative vessel, standing out not only for its remarkable size but also for its commitment to sustainability. With a gross tonnage of 215,863 GT and the ability to carry 6,774 passengers, it is powered by LNG (Liquefied Natural Gas) engines, significantly reducing its environmental impact while cruising. The ship’s sleek, futuristic design incorporates cutting-edge features like The Venom Drop, a thrilling stainless steel slide that spans 11 decks, providing passengers with an exhilarating experience. Beyond its adventurous offerings, the MSC World Europa also boasts spacious luxury accommodations, a variety of dining options, and a collection of unique entertainment venues, making it a prime destination for those seeking a blend of adventure, comfort, and sustainability at sea.
MSC Grandiosa
Operator: MSC Cruises
The MSC Grandiosa is a trailblazer in the cruise industry, blending luxury and technology. With a gross tonnage of 181,541 GT and a passenger capacity of 6,334, it is designed to cater to those seeking both cutting-edge features and comfort. One of its standout innovations is Zoe, a digital assistant available in every cabin, offering personalized services and providing guests with the convenience of a smart companion throughout their journey. The Galleria Grandiosa, a stunning promenade lined with LED screens, creates a dynamic and immersive atmosphere with visuals that transform the space, adding a futuristic touch to the ship. From elegant dining venues to a wide range of entertainment options, MSC Grandiosa offers an all-encompassing cruise experience that appeals to both tech-savvy travelers and those seeking relaxation and luxury.
Carnival Mardi Gras
Operator: Carnival Cruise Line
As Carnival’s largest ship, the Mardi Gras stands out with the first roller coaster at sea, BOLT. The cruise ship boasts a gross tonnage of 180,800 GT and can accommodate over 5,200 passengers. BOLT, the world’s first roller coaster at sea, offers guests an adrenaline-pumping experience while cruising the open waters. The ship is cleverly divided into six themed zones, each designed to cater to different interests and moods, ensuring that passengers can experience a variety of atmospheres throughout their journey. For example, one zone might be dedicated to fine dining, another to family-friendly activities, and another to nightlife or entertainment. From gourmet dining options to innovative entertainment, every part of the ship is designed to cater to the tastes and preferences of its diverse passengers. Whether you’re seeking high-energy thrills or relaxing in luxurious spaces, the Mardi Gras offers something for everyone, making it a must-see destination on the sea.
Costa Smeralda
Operator: Costa Cruises
Designed for eco-conscious travelers, the Costa Smeralda is powered by LNG and focuses on sustainability. The ship’s sleek, modern design draws heavy inspiration from the beauty and elegance of Italy, offering themed decks that evoke the country’s rich culture, from its art to its architecture. With a gross tonnage of 185,010 GT and a passenger capacity of 6,554, it can accommodate a large number of guests, all while offering a host of amenities. This includes a variety of fine dining options showcasing the best of Italian cuisine, from exquisite pasta dishes to fine wines, as well as numerous family-friendly activities like dedicated kids’ areas, outdoor play zones, and interactive entertainment to ensure every member of the family is entertained throughout the journey. Whether you’re seeking a relaxing holiday, an educational experience, or a blend of both, Costa Smeralda offers an Italian-inspired journey that aligns with a sustainable future.
AIDAnova
Operator: AIDA Cruises
The AIDAnova is another LNG-powered cruise ship made to blend eco-friendly engineering with luxury. With a gross tonnage of 183,858 GT and a capacity to carry up to 6,654 passengers, this modern cruise ship is impressive. A highlight of the AIDAnova is its expansive spa, which provides a tranquil retreat for guests looking to unwind with a variety of wellness treatments, saunas, and relaxation areas. The ship also boasts a wide range of dining options, from gourmet restaurants to casual eateries, catering to every taste and dietary need. Entertainment venues aboard the AIDAnova are designed to delight all ages, with live performances, family-friendly shows, and innovative activities for both adults and children. Whether you’re seeking relaxation, adventure, or simply a memorable experience at sea, the AIDAnova delivers a well-rounded vacation for all types of travelers.
What Sets These Mega Cruise Ships Apart?
The largest cruise ships in the world are more than just their size. They are equipped with:
- Unmatched Amenities: From water parks to gourmet restaurants, these ships offer experiences for every type of traveler.
- Innovative Design: Features like Central Park on Oasis-class ships or sustainable LNG engines on MSC and Costa ships push the boundaries of cruise ship engineering.
- High Capacity: With the ability to carry thousands of passengers, these ships cater to large groups and families.
Why Choose a Mega Cruise Ship?
Traveling on the world’s largest cruise ship offers the perfect blend of adventure and relaxation. Whether you’re drawn to thrilling attractions like roller coasters or serene spa experiences, these ships cater to all.
If you’re ready to explore the seas aboard one of these top 10 largest cruise ships, now is the time to book.
