building derelict derelict building head quarters headquarters hospital industrial industrial building main office mental home office public works stone stone building urban building urban office water works windows works architectural architecture bedrock bricks brickwork colors colours formation heritage historic Historic site kiln kilns light lime-kilns park patched patchwork repairs rock rock-work rocks rubble ruins shadows stone-wall stone-work stones structure sunlight surfaced surfaces surfacing texture textured textures variations varied wall walls landscape stairs steps stone-steps trees vegetation arch arching brick-walls arches historic-site archway