A 'friend' on DeviantArt.com shared 
this link with me, and I strongly recommend you check it out.  It is the story of the discovery of over 100,000 photographs taken by street photographer Vivian Maier,  photographs no other saw until after her death.
Some examples of her work:
 
 
 
 
 
 
 
 
Also, more of Vivian's amazing work at 
this blog by 
John Maloof (where I took these photos from).