accommodation angles appearances architectural architectural-elements architecture box-like buildings business-district CBD city city-scapes city-views colors colours concrete contemporary contrast contrasting cream distance distant elements exterior external glass heights high high-rise hotel light linear lines modern perspectives Perth recessed skyscrapers surface views walls wealth windows business district city scapes city views color colored colour coloured high rise office buildings rectangles rectangular reflections curve curved gray grey greyscale monochrome office-buildings Hong Kong sleek slim style abstract appearance blue building geometric geometric-shapes height panelling panels patterned patterns reflective rows square square-patterned squared surfaces textured textures unusual variations various wall distinctive offices