The "Antonis Tritsis" Metropolitan Park of Environmental and Educational Activities and Social Economy Development is located in Ilio and borders the Municipality of Agios Anargyro-Kamaterou. It is considered the largest park in Attica as it has an area of approximately 1,200 acres. It is a natural paradise that has greenery, six artificial lakes and an artificial canal that connects them and ensures the continuous flow of water. On weekends the average visitor is estimated at 15,000-16,000 and much higher during holidays.