I came across this puzzle site as I ... *cough* *cough* ... was looking for some answers to some of the games transpiring in the Offtopic threads.

Once you have clicked on one of the links, you will be presented with two images ... and once clicking on the images themselves ... you are ready to play "Spot the Differences."

I found it interesting, some fun and some rather good examples of what can be accomplished when enlisting the aid or aids of photo editing programs. More so, as to how the mind's eye can be tricked.

Nothing earth shattering to be sure ... but ... but ... it may provide some inspiration when looking at your images and the possibilities that may exist outside your mental paradigm. Hope you enjoy. :o)

Go here for "picture puzzle(s) to test the acuity of internet Hawkeyes."