New Glass Flooring Across Tower Bridge’s High-Level

Daniella Marchesi walks across the 11 meter by 1.8 meter wide newly installed glass floor 138 feet above the River Thames at Tower Bridge, London, on November 10, 2014, after a £1 million improvement. The floor will allow visitors a view of the bridge lifts and is the most significant change since the Tower bridge Experience opening in 1982. (Photo by John Stillwell/PA Wire)

A visitor crosses Tower Bridge’s new glass walkway on November 10, 2014 in London, England. (Photo by Peter Macdiarmid/Getty Images)

Cyclists cross Tower Bridge, over the River Thames, seen through a new glass floor in the bridge’s walkway on November 10, 2014 in London, England. Unveiled today the glass floor panels along the bridge’s high-level walkways weigh 300 kgs each, cost £1m and will give visitors a new view over the historic bridge crossing The River Thames. (Photo by Peter Macdiarmid/Getty Images)

A visitor crosses Tower Bridge’s new glass walkway on November 10, 2014 in London, England. (Photo by Peter Macdiarmid/Getty Images)

Tower Bridge opens to traffic, seen through a new glass floor in the bridge’s walkway on November 10, 2014 in London, England. (Photo by Peter Macdiarmid/Getty Images)

Pedestrians and traffic cross Tower Bridge as viewed through a glass viewing platform on the high-level Walkways during a preview to launch the new viewing experience at the Tower Bridge Exhibition centre in London on November 10, 2014. The new glass flooring at the Tower Bridge Exhibition 42 metres above the river Thames will allow visitors to gaze down on the bridge and river and allow them to experience the bridge opening from above. (Photo by Andrew Cowie/AFP Photo)

Photographers get a unique view of the River Thames from Tower Bridge’s new glass walkway on November 10, 2014 in London, England. (Photo by Peter Macdiarmid/Getty Images)