Freiburg im Breisgau's parks, green spaces, recreational facilities, playgrounds, roadside greeneries and the Mundenhof add up to an area of 397 ha (3.97 km2), which corresponds to 18.05 m2 of green space per Freiburg citizen. On average, major cities in Baden-Württemberg have 22.66 m2 green space/citizen. However, there is an area of 2600 ha (26 km2) of forest in the close proximity of Freiburg as well as additional recreational area like the Rieselfeld district (a former sewage farm). The majority of the green spaces came into existence from the 1960s on.