Tree House Nails

When Steve and I moved to our home, we discovered an old, falling down tree house sitting in a huge, dead oak tree. It was no longer usable, and we always wondered if the building of the treehouse killed the massive tree. Early this spring, after a heavy storm, I took the dogs on a walk around the property discovered that the old tree finally fell over. While inspecting the trunk, I noticed these nails poking through one part and thought they would make an interesting picture.