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 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 architectural-elements balconies balcony business commerce concrete costly curved edges expensive hazy multi-storey multi-story recessed rooftops Singapore surfaces towering towers tree appearances box-like holidays hotel hotels surface tourism tourists