armory army bricks building defend defense festung fortress green hidden historic long building. long roof modlin nature park parks protection roofs tower trees walls war angles appearance capping cleaning cover covered covering danger dangers ear protection edge exterior external height high high-pressure improvement maintenance pressure pressure-cleaning renovating renovation repairs restoration restoring risks risky roof roof-area roofing rooftop safety shapes skies sky spray sunlight sunshine textures tiles tiling tools tough water wet work workman accommodation angled apartments architecture balconied balconies buildings colors colours contrast distinctive edges flats home house light linear lines modern modernistic perspectives rooftops rooves row secure shape structure structured style surfaces texture units views windows atmospheric berlin classic decoration decorative facade facade greening fence gable grunewald houses mansion representation representative rural villa