a close-up of (I believe) the bark of a long-dead tree, burrowed into by hundreds of long-ago wasps for a nest

a close-up of exposed wood of a long-dried-out tree, with hundreds of lines flowing in a very organic, liquid form, and a small piece of sap ornamenting the lower right quadrant

more dried-out-tree close-up, with hypnotic swirls in the wood, resembling a weather forecast graphic of a hurricane

a personal favorite subject of fascination, grooves eaten into the just-under-the-bark surface of a tree's wood by termites, in a pattern that will never cease to resemble some ancient cursive writing to me; the sun at a low angle to the surface casts these grooves in dramatic shadow