I have a decaying crabapple tree in my yard that the city said (two years ago) they would take down, but they haven't gotten around to it. Yesterday, a pileated woodpecker discovered it, and kept pecking away at a ground-level cavity in the tree. For this image, I rotated it and created it's mirror reflection, and then applied Topaz Impressions Cave Dweller filter, masking out the bird. The filter turned the wood a little too yellow, so I de-saturated the yellow a bit.