Surprising discoveries

I have a lot of photos and, still, for many of them have not I had time to analyze them before they give life, on www.fineartamerica.com, for example. However, I succedeed, from time to time to re-view them in order to remember the places I have seen, or simply in order to be...surprised.It is a great delight to discover that, with no intention, I caught the picture something that did not crossed my mind in that moment, or something in addition to the subject thought by me.
Sometimes when I play with the picture's lights or its contrasts, I get unexpected surprises. An example is the window that appears in picture of this blog. I thought until now that it's a window covered with a wood surface (not showing the actual window). When I have taken the picture I did not realized, but the window have some ... stained glass.
There is only one example for me. In a picture taken at San Pietro in Rome, I discover the lights that I do not always recognize them, compared to what I previously have seeing.
Maybe that's why we all, we are pleased to pass again and again through old pictures.

What wonderful things you've discovered in your pictures? (I am terribly sorry for my english :))