As of 2026, SeaWorld Yas Island, Abu Dhabi holds the title of the largest SeaWorld park, having been officially recognized by Guinness World Records as the "Largest Indoor Marine-Life Theme Park" in the world. It spans over 183,000 square meters across five indoor levels and features eight immersive "realms." Among the US-based parks, SeaWorld Orlando remains the largest in terms of total acreage and the number of record-breaking roller coasters, such as Mako and Pipeline. While the Orlando park offers a vast outdoor campus with extensive stadium shows, the Abu Dhabi facility represents the "next generation" of the brand, focusing on massive, climate-controlled indoor habitats and the world's largest multi-species aquarium (containing 25 million liters of water). Whether you measure by internal square footage or total ride count, these two locations represent the pinnacle of the SeaWorld experience in 2026.