angles appearance architectural building construction cover covered edge edges edging elements exterior external height high light linear lines maintenance modern orange patterns perspectives placement renovating renovation repairs roof roof-area roofing rooftop roofwork rooves rows shade shadows shape shapes stack stacked stacks style surface surfaces terracotta textures tiles tiling work abstract angled apartments architecture backgrounds buildings chinese city clear colors colours contrast curved diagonal flats heights homes houses overlap overlapping roofs rooftops rounded Singapore steep streets texture units windows contrasting corrugated corrugated-iron historic metal mixed old sunlight sunshine Haze smoke architectural-elements clean community evergreens flora flowers foliage garden green greenery ground-cover layered layers levels maintained multi-level paving peaceful planned plants public retaining-walls rockery rocks seating shrubbery shrubs slope sloping stones stonework strength strong sturdy terraced tranquil trees vegetation aim aimed aiming Australian-Defense-Force barrel coast coastal-defense combat-readiness death defence defend defending defensive destruction destructive emplacement equipment gun gun-emplacement gun-platform gun-turret heritage hilltop history military mounted mounted-gun placed protection protective secure security upward vantage-point weapon weaponry weapons World-War-2 wwii