When I first visited London many years ago, I collected an acorn from Kensington Gardens and planted it in my back garden at home in Italy.
A nice little tree was born (picture 1).
Then I scanned a leaf and uploaded it to stock sites (picture 2).
Recently I found this ad at Westminster station (picture 3).
Little did I know that a leaf from my oak tree would return to London some fifteen years later as a stock photo.
Well, these are the little joys of a stock photographer. And just to make this out of topic thread a bit less useless, please feel free to post your interesting findings as well...