A new glass walkway installed in London's Tower Bridge is offering visitors a vertigo-inducing view of the Thames from 42m up.
The £1 million installation in the West Walkway will give a unique perspective on traffic below as well as when the bridge opens to allow boats through.
Christopher Earlie, the business and marketing manager from the bridge, told the BBC: "The opening of Tower Bridge marked the dawn of a legendary feat of engineering creating what is considered by many as the most famous bridge in the world.
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"For the first time ever, visitors will be able to experience a never-seen-before viewpoint of London - the Thames, road and pedestrian life, all moving at pace 42 metres below."
The East Walkway will open next month.
Tower Bridge is 120 this year, opening in 1894 after a competition to design a bridge to solve the capital's cross-river traffic problem.