You don't have to be a superhero to have a go at the world's longest urban zipline, but you'll feel like one at the end of it! XLine is the world's longest urban zip line and exciting new addition to the Dubai Marina skyline. Go on your own or with a friend as you ride down the 1km line and fly over land and water at up to 80km/h, and takes you from 170m down to ground level.