A vertical close-up depicts the rough, textured bark of a tree, located in Esch-sur-Alzette, Luxembourg

A vertical close-up depicts the rough, textured bark of a tree, located in Esch-sur-Alzette, Luxembourg. The bark is characterized by deep, irregular fissures and ridges, displaying a palette of greys and browns, with subtle reddish-brown hues within the crevices. Scattered across the surface are numerous irregular patches of vibrant yellow-green foliose lichen, varying in size and density. Several distinct, circular formations, consistent with tree knots or former branch attachments, are visible, notably in the lower-left and upper-right portions of the frame. No human subjects, animals, or artificial objects are present within the natural environment captured.