Ключевые слова: abstract, autobahn, backgrounds, ballast, circle, closeup, cobblestone, concrete, construction, contrasts, curve, dappled, detail, geology, gravel, grey, heap, high, macro, material, mineral, nature, nobody, object, old, one, oval, pattern, pebble, rock, rough, rounded, roundish, rubble, shape, simplicity, smooth, spotted, stone, street, strength, symbol, texture, textured, toughness, wallpaper, weight, white, zen,