1 km-long zip lines starting at skyscraper to open in Dubai
Two 170-metre-high zip lines are opening this week in Dubai. The 3,280-foot-long zip lines will allow people to travel at speeds of 80 kilometres per hour, and tickets will cost roughly Â£132 (â¹11,500) per person. Starting at the top of a skyscraper, the adjacent zip lines will offer couples and friends the chance to experience the ride alongside each other. 