One type of image I always like are those with motion, such as the image below of sea stacks. The waves flowing around the rocks blur into a misty background. I took this photo at the end of the day using a 3 stop neutral density filter. The filter allowed me to take a 20s exposure, so that the motion of the waves produced a soft, flowing sea around the solid sea stacks in the foreground. The image itself was taken along the Central Coast of California. The stacks are coloured by the glow from the setting sun which you can see in the background.
Sea Stacks along the Central Coast -©Jon Bertsch
Details: Nikon D200, Nikon 17-55mm @48mm, ISO 100, f.20, ~20s
Neutral density filters come in a variety of strengths. Buy one and see what different effects with waves, waterfalls and rivers you can produce – maybe you’ll find some new ways of seeing the World.