Royalton Splash Riviera Cancun The newest resort in the area is part of Marriott’s nascent all-inclusive portfolio. The massive, well-executed resort has 1,005 rooms, 10 eateries, 12 bars and amenities like a bowling alley and even an indoor trampoline park. But the “Splash” is in the name for a reason: the centerpiece of this resort is a sprawling, impressive waterpark, one of the largest in the whole Caribbean.