From the top of the Cathedral tower, people can see all of the old city where the medieval townscape, inscribed as World Heritage, remains intact.

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If your legs are up to it, continue up the river past the Golden Hinde and Southwark Cathedral to the iconic Tower Bridge.

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From the 360-degree observation deck on the 72nd floor of the Shard, the tallest building in Western Europe at 310m, London opens up like a pop-up book and the landmarks of St Paul's Cathedral, the Houses of Parliament and Tower Bridge look toy-town tiny.

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Its walls enclose a still-intact 12th-century round tower, 13th-century Gothic cathedral and exquisite 12th-century Romanesque chapel.

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Crowds were out in force as the marathon wound its way past some of London's most iconic landmarks such as Tower Bridge, St Paul's Cathedral and Westminster, before finishing near Buckingham Palace.

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The 418ft (130m) high Grade II-listed tower - taller than St Paul's Cathedral in London - was built by Express Lifts and opened by the Queen in 1982.

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Mountains tower over valleys lying deep in snow, their cathedral-spire peaks turning red in the rays of the setting sun.

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The tower, which is 418ft (130m) tall - higher than St Paul's Cathedral in London, was built by Express Lifts and opened by the Queen in 1982.

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