River flowing around mossy rocks and autumn leaves.

This is at Hardcastle Crags, photographed about this time last year. I took 3 different exposures - one fast, one very long and this one, which I think captures the best of both - the darker water is smoothed out to simplify the scene, but there's still an element of movement in the white water.

Camera/lens settings: ISO 100, f/18, 5s, 38mm, tripod & cable release.