hellental, germany - 07 30 2020: damwall of oleftalperre with the two big overflow channel the air side

bridge landmark architecture waterway river transport water reflection monument facade memorial vehicle arch canal stadium building reservoir hellental germany 2020: dam wall oleftalperre overflow channel ares oleftalsperre one big freshwater lakes west eifel close border belgium british called olef huge serves drinking supply flood prevention power plant included damwall two air side belgium dam wall