It seems there might be a bit of confusion here. As of my last update in January 2022, there isn't a water park named "Meryal Waterpark" in Qatar or globally recognized as the "craziest" water park in the world.
However, Qatar is home to several world-class water parks that offer thrilling rides and attractions. One of the most prominent water parks in Qatar is:
Aquapark Qatar: Aquapark Qatar is the largest water park in the country and is located in the Abu Nakhla area near Doha. It features a wide range of water slides, wave pools, lazy rivers, and other attractions suitable for visitors of all ages.
The park's highlights include the "Thunder Cruise" slide, the "Tornado" funnel ride, and the "Wave Pool" where visitors can surf or swim in simulated waves.
Aquapark Qatar provides a fun-filled experience for families and thrill-seekers looking to cool off and enjoy aquatic adventures.
While "Meryal Waterpark" doesn't appear to be a recognized destination, Aquapark Qatar and other water parks in Qatar offer plenty of excitement and entertainment for visitors seeking water-based thrills.