angles appearance architectural architecture bottle green building chinese Chinese architecture curved curves dark decorative design elements exterior external fancy features green height heritage high historic historical ornamental ornamentation patterns peak perspectives points ribbed roof roofing rounded shapes slope style surfaces tiles traditional appearances arid Cacti cactus clumps clusters coloring colors colouring colours display edge edges flora garden garden-display garden-plants irregular leaves light perennials plants pointed protection shape sharp short-spikes small-spines spikes spines spiny succulents surface textures unusual