Built in 1894, Tower Bridge is one of the most recognisable structures in London. Standing 65m above its platforms it is the tallest bridge going across the Thames. When first built, steam engines would pump to drive the 1000 ton bascules up to full height in less than a minute. Today they are powered electrically. In 1952 a red London bus jumped a 3ft gap between the bascules after a traffic light was stuck on go. A number of pilots have attempted to fly under Tower Bridge with at least one hitting the Thames and dying. The space between it is only 65m x 30m.