aerial view of a dam surrounded by mountains and a serene lake in milos

39aph39 aerial architecture back beauty blue civil construction creating dam drainage energy engineering environment floodgate flow flowing generation generator geographic green hold hydro hydroelectric imposing industry infrastructure lake landform landscape large lush management marvel milos mountains natural nature outdoor outdoors overflow peaceful power reflection reservoir reservoirs resources river rocks scenery serene structure sunlight surrounded sustainable technology tranquil tranquility trees valley view walls water wildlife