where is this aforesaid bridge located?
Western end of the Pool of London
London Bridge
The current bridge stands at the western end of the Pool of London and is positioned upstream from previous alignments. 
where does the song london bridge is falling down come from Similar rhymes can be found across Europe, pre-dating the records in England; it is possible that the rhyme was acquired from one of these sources what is it all about? It deals with the depredations of London Bridge and attempts, realistic or fanciful, to repair it how did it originate? Similar rhymes can be found across Europe, "Knippelsbro Går Op og Ned" from Denmark, "Die Magdeburger Brück" from Germany, etc. It is possible that the rhyme was acquired from one of these sources what does it mean really? The meaning of the rhyme is not certain is there any game related to it? Yes, used in a children's singing game
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London Bridge [SEP] Introduction
Several bridges named London Bridge have spanned the River Thames between the City of London and Southwark, in central London. The current crossing, which opened to traffic in 1973, is a box girder bridge built from concrete and steel. It replaced a 19th-century stone-arched bridge, which in turn superseded a 600-year-old stone-built medieval structure. This was preceded by a succession of timber bridges, the first of which was built by the Roman founders of London. The current bridge stands at the western end of the Pool of London and is positioned upstream from previous alignments. The approaches to the medieval bridge were marked by the church of St Magnus-the-Martyr on the northern bank and by Southwark Cathedral on the southern shore.