The Koyna Dam is the biggest dam in Maharashtra. Constructed on the Koyna River, its main purpose is the generation of hydroelectric power. It also channels water for irrigation. It is the largest completed hydroelectric power plant in India. Spanning over an area of 70 km, it reaches all the way to the Mahabaleshwar. When you reach the top, you will get a splendid view of the nearby landscape and the catchment area of the dam known as the Shivajisagar Lake. Built 3000 feet above the sea level, Koyna Dam spans over an area of 70 km. You can have a splendid view of lush landscape and catchment area of the dam that is known as Shivajisagar Lake.