Here's one that my darling husband shared with me recently that is more of the inspiring-tear-jerking sort - Dear Photograph.
The concept is to take an old picture and put it in front of your camera in the same location it was taken years ago. There is something haunting and beautiful about many of these images. Check it out!
Whatayathink? I've got the perfect picture in mind to take and submit. Now...to find that picture! ;D