A mountainous artificial lake that combines a unique labyrinth of streams, natural small lakes and extensive mountain meadows that bustle with life. The artificial lake of Aoos springs is located in the east of the Prefecture of Ioannina, about 20 km northwest of Metsovo. The lake was built in 1987 on the Politses Plateau in order to produce energy. Around it there are 7 small dams with the largest one having a height of 78 m. Its area is 11,5 km2. and is at an altitude of 1,350 meters, which classifies it as the most mountainous large lake in Greece. It is located between two National Parks, Valia Calda and Vikos-Aoos.