The simplicity of this picture is very pleasing!
At first I was going to give it a sophisticated title like "Euclid's fifth postulate." But then in the middle of the night, I realized that might not be the best title since the Quonset hut is 3D and the lines are not straight and I didn't want to get into geometry that complex for the title of a photo. The photo may be simple, but naming it took me back to my Abstract Geometry class... much of which I have forgotten.
I would have had to google Euclid's Fifth Postulate to refresh my memory..."parallel" was a great choice. It was a great shot, too!~ Betsy