I did all this work to show off both arches, which I have always been attracted to. The central column shown in this image is actually a 2ft-high arch stretching over my head while I was taking the shots. To add considerably to the difficultly, all these shots were blind or mostly blind, and taken with the camera on the ground. It took me two visits here two weeks in a row and about 10 hours of PS work to finally figure out how to put this all together correctly in a way I found pleasing and accurately portrayed the subject matter. I might have wished to move the central column a bit, but found this impossible.
Lastly, I let the highlights blow in every exposure on purpose to 'bleed' the light just a bit around the edges, another luminous effect I personally like.