Carved pond: seascape with the blue hour colors, Sardinia, Italy

Carved pond. The sun has finally set, after a long and hot day of summer. The last light diffuses in the warm and humid air, painting a soft gradient of colors that mirrors on the still and shiny surface of a pond, inside the ancient punic quarry of Pixinnì, guarded by a watchtower.
The elements which I’ve wanted to put in relation one another in this photograph are the clean sky, whose delicate colors are mirrored on the polished surface of the water, and the harsh rocks of the quarry, whose rough surfaces have been carved first by the hands of men and then by the action of the wind and the water. As a result, there’s almost a sense of harmony between the opposites.
To capture this view I’ve used an ultra wide angle lens and two filters: a 6 stops ND which extended the exposure time to two minutes, smoothing out in this way the surface of the sea, and a 2 stops graduated ND filter, which darkened the sky just enough for better balancing the brightness of the scene. Then, with a fairly straightforward post processing, I’ve adjusted the local contrasts and the color balance of the scene, with the use of the luminosity masking.