This is the White Ernz river, shot from the bank during a mountain bike trip.
Easily reachable by foot, this spot is located a few yards away from the famous Schiessentumpel waterfall attraction, near the village of Müllerthal that gave its name to the region, also known as Little Switzerland, in Luxembourg.
I used a neutral density filter to increase the exposure to 13 seconds during the daytime, as well as a polarising filter to reduce reflection (see the vignetting effect on the top right side of the image).
