angles appearances architectural architectural elements architecture box-like buildings city city scapes city views colors colours concrete contemporary contrast contrasting dark elements exterior external glass heights high high rise light linear lines modern perspectives reflections skyscrapers surface surfaces views walls windows abstract appearance chips close-up color colour conglomerate crack dividing-line drive driveway gray green grey groove growth life line macro mixed mixture moss moss-covered moss-growth plants rocky rough solid sprouting straight texture textures architectural-elements barbed-wire building fence fencing height industrial secure security square undustry care caution down greenery handrails lookout mound open public railing rails rocks shade shadows slabs slope sloping stairs steep steps stones stonework strong sturdy style sunlight sunshine vegetation background barrier brown cemented coloring colouring constructed local-stone mortar old pattern patterns perspective picturesque random randomly-coursed rock shape shapes significant stone stone-walled strength stucco traditional uneven variations variety wall well-built business district CBD distance distant Hong Kong office buildings sleek slim wealth corner limestone retaining-wall rural