The jewel in the crown of this SeaWorld water park in Orlando, Florida, features two side-by-side enclosed tubes that run through a pool of water before you reach the pool at the end. On its path you'll zoom by a pod of friendly black-and-white Commerson's Dolphins, who are renowned for their playfulness and aren't shy of having a race with you.

JUMEIRAH SCEIRAH: Wild Wadi Waterpark, Dubai
This 395ft-long tandem slide begins with two guests crossing their arms and legs before a sudden 30ft drop through a trap door at a 70-degree angle. By the end of it, you're sliding at up to 50 miles per hour. It's all over in a matter of seconds but the bragging rights, given the racing element, can last a lifetime. A bonus for visitors is that after the 100ft climb to the top you can get a spectacular panoramic view of the entire park.
Among nine very different slides at Atlantis, the Leap of Faith is by far the most exhilarating. It boasts a 60ft near-vertical drop from the top of a replica Mayan temple but that's not even the fun part. As the sliders speed down they go through a clear tube that goes through lagoon filled with a shiver of circling sharks.
A viral video brought this slide to international acclaim - the tanned and toned young people starring no doubt didn't do it any harm. But the fact it has an exciting ski-jump like ending should impress as well. Unlike the video, proper paying visitors will have to don a lifejacket, and fair enough too given the height that can be achieved when sliding at speed.
Read more on the Daily Mail.