Inside the world's first cruise to get a go-kart track

Inside the world's first cruise to get a go-kart track and its own private island. Norwegian Cruise Line's ship, Norwegian Joy, boasts a heart-racing attraction that stands out from the rest - and it happens to be a world first.Out in the middle of the ocean, guests can climb into go-karts and zip around at speeds of up to 35mph on the vessel's two-level track, Speedway.The world's first go-kart track built directly on top of a cruise ship features sharp bends and technical turns, offering an adrenaline-fuelled experience for families and guests of all ages aboard the sprawling 3,804-passenger vessel.In a new YouTube documentary, Ship Shape, the Daily Mail goes behind the scenes of the impressive liner and takes a look at the various high-adrenaline activities on offer - from the one-of-its-kind go-kart track, to a private island with two huge zip lines.