A glass walkway which gives visitors a bird's eye view of traffic has been unveiled at London's Tower Bridge.
Tourists can test their head for heights by venturing on to the structure which soars 42m (138ft) above the Thames.
The £1m walkway is 11m long and gives visitors a unique viewpoint of the world-famous bridge lifting, as well as the traffic and boats below.
The West Walkway was unveiled with the East Walkway opening next month. BBC News
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