Josef Koudelka, Prague, 1968 Nov 24 2006
This is one of my favorite photos:
It was taken by Josef Koudelka in Prague in 1968, just before the Soviet Union invaded and put a stop to The Prague Spring. To demonstrate the emptiness of the streets at noon, Koudelka stuck his wristwatch into the scene before shooting it. A simple, brilliant gesture that adds not only a temporal dimension to the photo but also a sense of solitary humanity in contrast to the empty streets.