To me, this is a very dramatic representation of the damage inflicted on the beautiful city of London during the Blitz.  The dome of St Paul's cathedral is at the center.  As this area of London hield many government buildings, it was targeted very heavily.
God Bless those Londoners who lived through WWII

(The damage is so much more stark in full color)

London with St Paul's during Blitz

London during the Blitz

One of the narrow streets of London showing the damage at street level the Blitz had caused.  