This photograph is captured above Vallerhermoso in La Gomera, Canary Islands. The high peak in the center is Roque Cano. This is a 67 seconds exposure, done with a 10 f-stop neutral density Lee filter (they call it the "Big Stopper"). I used a long exposure to capture the movement in the clouds. Below I show the main steps of how I processed this image, but first a comparison between the initial unprocessed capture and the final result...