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 London Bridge Is Broken down With a gay Lady.</poem> A version from James Ritson's "Gammer Gurton's Garland" (1784) is similar but replaces the last verse with: <poem> Build it up with stone so strong, Dance o'er my Lady lee, Huzza! 'twill last for ages long, With a gay lady.</poem> The meaning of the rhyme is not certain. It may simply relate to the many difficulties experienced in bridging the River Thames, but a number of alternative theories have been put forward. One theory of origin is that the rhyme relates to the supposed destruction of London Bridge by Olaf II