Mammoth, Splashin' Safari, Indiana

Meet Mammoth, the longest watercoaster in the world measuring in at a mammoth 1,763ft long (one-third of a mile). It opened in Splashin' Safari, Indiana, earlier this year.

Like Wildebeest, the previous holder of this title, Mammoth uses cutting-edge hydromagnetic technology to propel six-person inflatable boats at breakneck speeds along a series of rollercoaster-like uphill climbs followed by fast downward plunges. The ride begins with a 300ft conveyor "lift hill" followed by a series of drops, including one three-storey drop while you're tilted at a 45-degree angle.