A large natural sinkage of the soil, at an altitude of 470 m, which has been supplied for about three million years with fresh water from runoffs and springs on the surface, is the largest in Epirus and one of the oldest in Europe. It has greatly influenced human activity in the region and continues to influence important aspects of social and economic development. The rich flora and fauna played an essential role, but also the diverse surroundings, with swamps, ponds, reeds, grasslands, brakes and forests. It is the most recognizable natural monument of the city - associated closely with its prestige - and a primary attraction, both for its residents and visitors. The lakefront area is crowded almost on a daily basis for boat rides to the Island, for lakeside walks and bicycling in the parks with the beautiful sculptures, or at the cafes-bars and restaurants. The lake also has a rowing and α water ski track for sports clubs and athletes.
The unique location of the lake makes it one of the most beautiful in the country, with soft green banks and towering mountains all around it.