I have done nothing to this photo other than to crop its length a little and rotate it. It is a section of bark from a gum tree. The tree is weeping resin from a nail embedded in it, has bark which is cracking prior to falling off and has a streak caused by a water/fungal stain. Viewed on the tree it is a bit depressing but I really like the abstract it forms.
@30pics4jackiesdiamond It goes back 20 years to when the kids wanted a basketball hoop. That's long gone but the nail is still there, and the tree's still weeping. Saying this out loud makes me feel quite guilty!! Poor tree.