abstract angles architectural architecture buildings business-district city city-scapes city-views color colored colors colour coloured colours commercial-building contemporary contrast contrasting distance distant elements exterior external glass green heights high high-rise light linear lines metropolis metropolitan-area modern office-buildings perspectives rectangles rectangular reflections skyscrapers tower-block urban-area views walls wealth windows accommodation appearances architectural-elements balconies balcony box-like concrete costly expensive holidays hotel hotels multi-storey multi-story recessed surface tourism tourists curved