I have a relatively good grasp of British geography for a foreigner. When I was around 15, I had memorised all the stadiums of the four divisions of football/soccer, but since then, many things have happened: New teams have replaced some of the old ones in the system, some have now other home grounds and certain fields have been renamed. In addition, my memory has started to fail me, so if I remember ten correctly these days, I will be happy!