This one gives us the heebie-jeebies – imagine rolling across a footbridge 20 floors up that spans Copenhagen’s city harbour.
This time next year you could be doing just that in Denmark’s capital, thanks to the Copenhagen Gate project. It was designed back in 2008, then shelved following financial pressures, but the plan has been revived for 2016.
Related: 10 things that'll make every cycle commuter furious
As you can see from these artist’s impressions, the cycle and pedestrian bridge will cross between two yet-to-be-built skyscrapers, with elevators in each tower to haul you up. It’s being designed to allow cruise liners access to the city port, hence its height.
Perhaps too high, in our opinion – just don’t look down.