This is the new footbridge across the Clyde in Glasgow, connecting the city centre with the derelict warehouses of Tradeston. The original bridge design by Richard Rogers, called Neptune's Way, was abandoned when projected costs were far above the council's budget.
Instead, this bridge was designed by the Danes, Dissing and Weitling, associates of Arne Jacobsen, who have also designed the Great Belt (between the 2 parts of Denmark) and Øresund (between Denmark and Sweden) bridges. They have also won the competition to design the new Forth Bridge.
It is actually more striking up close. If you see it from down the river, you don't appreciate the curves, which give it a striking appearance from the riverside approaches.
Youtube has videos of people running up and down the towers – looks easy at the bottom but gets very narrow at the top!