In the narrow stream of a river in the province of Ávila, Spain, I decided to dip my feet into the water. This allowed me to get as close as possible to the small waterfalls and experiment with various effects using different neutral density filters. These filters provided me with the flexibility to adjust the exposure time to achieve different outcomes in the appearance of the water.
Furthermore, it's worth highlighting the excellent work that the polarizing filter did in enhancing the sense of motion in the water by eliminating unwanted reflections.