Tower Bridge bridge's upper walkways. The pedestrian walkways are above the river at high tide. The main bridge deck carries two lanes of road traffic between two low-level pedestrian walkways across both suspension spans and the opening bascule section of the bridge, with the walkways separated from the roadway by fences. The roadway passes through each of the two towers, whereas the low-level walkways pass around the outside of the towers. One of the chimneys on the bridge, which are often mistaken for lamp posts, connects up to an old fireplace in a guardroom of the Tower of London. It is long-disused.
London Bridge Is Falling Down children in the foundations of the bridge was first advanced by Alice Bertha Gomme (later Lady Gomme) in "The Traditional Games of England, Scotland and Ireland" (1894–1898) and perpetuated by the usually sceptical Iona and Peter Opie. This was based around the idea that a bridge would collapse unless the body of a human sacrifice was buried in its foundations and that the watchman is actually a human sacrifice, who will then watch over the bridge. However, there is no archaeological evidence for any human remains in the foundations of London Bridge. Until the mid-eighteenth century the Old London Bridge