above aerial-balloon angled angles apartment-blocks architecture backgrounds balloon below buildings cityscape colors colours condominiums flats flight-operation gondola height helium helium-balloon high high-rise modern motion movement multi-storey multi-story perspectives roofing roofs rooftops rooves safe safety scene scenery scenic secure secured shape shapes sights sightseeing Singapore skyline streets traffic views accommodation apartments art-deco balconies building city complex condo condominium contrast contrasting dark detailed distinctive elements exterior external façade heritage historic light linear lines metal modernistic patterns plain protection quality sepia straight structures style supports tall units valuable windows architectural-elements balcony business city-scapes city-views commerce concrete contemporary costly curved distance distant edges expensive glass hazy heights recessed skyscrapers surfaces towering towers tree walls wealth appearances architectural box-like holidays hotel hotels surface tourism tourists