The City also has three of London's all star attractions, the previously covred St. Paul's Cathedral, the Tower of London, and the Tower Bridge, pictured here. Everybody knows that this is Tower Bridge and not London Bridge, because every guidebook leads with the statement that tourists always mistake this bridge for London Bridge, thus making it impossible for any tourist to in fact make this mistake. The second sentence would then let you know that the original London Bridge was sold to an American and transported to Arizona, I think. So the very photogenic but not that historic Tower Bridge now takes pride of place among London's bridges.