Atlantis, The Palm's waterpark: 105 rides and slides across 17 hectares, anchored by the Aquaconda (the world's largest water slide by volume) and the Leap of Faith (a near-vertical drop through a shark-filled lagoon). Private beach included. The infrastructure is genuinely world-class — well maintained, rarely crowded on weekdays, consistently among the highest-rated waterparks globally.

Day passes are expensive. Worth the full day; half-day visits run out of time. The Lost Chambers Aquarium is inside the hotel if you need a drier option.