background color colors colour colours concrete cool cooling evergreens ferns foliage gardens greenery lampposts lamps light lights open outdoor outdoors park parkland path pathway paved paving peace peaceful public quiet rest-area rustic seating seats secluded shade shadows shrubbery shrubs sunlight surface surfaces surfacing texture textured textures tranquil trees angles appearances architectural architectural elements architecture box-like buildings city city scapes city views contemporary contrast contrasting dark elements exterior external glass heights high high rise linear lines modern perspectives reflections skyscrapers views walls windows abstract appearance chips close-up 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 architectural-elements barbed-wire building fence fencing height industrial secure security square undustry care caution down handrails lookout mound railing rails rocks slabs slope sloping stairs steep steps stones stonework strong sturdy style sunshine vegetation 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