This is an image taken in a local conservation area, slowing the shutter so that a flowing river becomes a torrent of water, wearing down the rock that sits in the middle of the deluge. A 5 second exposure at f5.6 using an ND filter.
This image was taken some time ago in winter. It seemed like a perfect candidate for a white border; sometimes photographs are enhanced by the defining border but other times it doesn't work. This time I think it did, but feel free to comment.