My grandmother, my mother, and me. 1972.

I don't know who took this; but whoever did had a really good eye. It's a fantastic example of the Rule Of Thirds: the shores nearly perfectly follow the horizontal third-lines, and the vertical lines pass through us and the house (and its big tree). We're on one of the intersections, and the house is on another. And, there are twin low points (one to our right, and one to the left of the house) on the other two intersections. Once I draw it in my mind, my eyes can't escape the box those four points make - and yet the box itself is completely empty.

Pretty impressive for a snapshot, IMO.