back wall of an old fort in ruin

africa architecture back background bare beauty black bold brown color coloured construction corner damaged daytime decay decommissioned dilapidated engravings environment fort graffiti grass green grey grunge grungy historic image inner light material mortar old plaster pretoria red remnant robust rock roofless rough ruin ruins rust secluded sky south stained stone strong structure surface texture top trees vegetation view vintage wall walls weathered wonderboom