Shot at sunset with a 24-70mm at ISO 100, f/7.1, 1/500th sec. I substantially adjusted the levels in Lightroom to accentuate the silhouette.

This included lowering exposure, increasing color temperature, increasing highlights, decreasing whites, increasing clarity a tad to make sharper edges. In the tone curve I decreasing the dark range while increasing highlights and lights. I also used Split Toning to change shadows to a 30 saturation of an orange/red hue. To complete the sky's coloring, I lowered the hue of oranges and reds while increasing orange saturation a bit.