Well I like the inclusion of the castle walls itself, otherwise it is just some arb reflections in water. With the walls you see the source of the reflections. Nice details in them too with good exposure control between the shadowed area and the left side. Portrait format definitley was the right choice, works well with the tall battlement reflected in the water. I like that idea actually, most people would take a photo of the battlement itself, but you went and took a photo of it's reflection, good idea :)
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