hellental, germany - 07 30 2020: overflows in the middle of oleftalperre, big holes high up and the two very steep channels

architecture monument landmark memorial facade wall arch column sculpture statue building iron art downtown tower bridge skyscraper 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 steep channels