adornments angles architecture chimneys colors colours corrugated corrugated iron heights high lines metal modern patterns perspectives placement roofing roofs rooftops rooves rows shape shapes style suburban surface surfaces textures tiles tiling windows abstract background backgrounds building buildings contrast diagonal edge edges historic lichen loose nails old overlap overlapping pattern roof slate texture tile above aerial-balloon angled apartment-blocks balloon below cityscape condominiums flats flight-operation gondola height helium helium-balloon high-rise motion movement multi-storey multi-story safe safety scene scenery scenic secure secured sights sightseeing Singapore skyline streets traffic views