Australia blue brown bush central Australia clear-sky desert-country desert-region dry foliage gully height high hill hot inland outback rocks rocky rough rugged scrub shrubbery shrubs sky sunlight sunshine terrain textures trees vegetation abstract bark black blackened burnt burnt-out charred charring damage damaged eucalypt gnarled knobbly layer layered life nature persevering persistent pitted pitting resilience resilient scarred scars strength surface surfaced surfaces texture textured tree trunk Alice Springs ancient hills historic mountainous mountains ridge