GeoGraph - photograph every grid square

Circle Line as seen from Porchester Terrace

This is where, when underground railway line was being built, houses were knocked down in order to excavate the line using the 'Cut & Cover' method. As the original trains used steam locomotives, it was necessary to leave sections of track uncovered...these sections could then be used to let out steam. So, rather than rebuild the houses that had been knocked down, they simply built false house fronts with nothing behind.