The inverted U-shaped structures in this photograph, which was taken in Marshfield, Massachusetts, are used for stringing clothesline. I originally shot this photograph as a stereo view, printing it as a card that could be seen in 3D using a 19th-century stereoopticon viewer, a fixture of Victorian parlors. In order to produce the 3D effect, I exposed two frames of the subject three inches apart--about the distance between human pupils. When "fused" into a single image by the prisms in a stereo viewer, this produces a powerful illusion of depth. The black band is the ocean, darkened with a red filter.