wow. ery unique image. That column supports a lot of weight - glad you included it! I think the softness of the focus enhances the image - works with the shadowing and color tones. Also think duotone here works. Only thing here, and not necessarily best choice as I don't know conditions at the location - maybe capturing a bit further back with entire column would have improved. Without seeing that, I can't say if it would improve or not. 7
Excellent location for this challenge. This composition is way too busy for my liking, with the central white pillar distracting from the main subject which is those arches. I love your choice of duotone and soft focus. Lighting is a touch over whitened for my tasts.