So you know Tower Bridge?
The new floor measures 11 metres long and 1.8 metres wide, and is made of panels weighing 530 kilograms each. So, y'know, it's pretty sturdy.
Look at 'em. They're all so tiny.
You can watch Tower Bridge in action.
And everyday London life happening below.
Still, it probably won't be for those with an aversion to heights.