This is the O2 Arena located in Greenwich (South East London), which is one of the largest indoor arenas in Europe. Its construction was finished in 2007 and it is now used mainly for large scale concerts and sports events.
The shot is taken from Leamouth (area of London) on the other side of the River Thames.
Camera used: Nikon D60 with Nikon VR18-55mm lens.
Featured in the Architecture – The British Isles Group in April 2010.