hellental, germany - 07 30 2020: dam wall of oleftalperre, overflow channel ares

landmark architecture monument memorial facade wall building tower bridge arch downtown waterway transport statue column skyscraper tree hellental germany 2020: overflows middle oleftalperre big holes high oleftalsperre one freshwater reservoir lakes west eifel close border belgium british called olef dam huge serves drinking water supply flood prevention power plant included overflow channel ares