Is an artificial lake, it has also stream and forest. Rare flora and fauna. Boating and fishing, walking and cycling activities can be done in this place. The protected natural area since 1997. The official name flood control reservoir of Szilas creek. The lake formed in 1978 through the backwater of Szilas creek. The area was declared as protected land because there, around the lake, the surrounding reeds and lower and upper meadow of the ‘valley’ of the Silas creek, evolved a rich flora and fauna. A protected plant species are found here, such as ostrich fern (Matteuccia struthiopteris), different Orchids, Siberian Iris, cottongrass. Among the protected species here are praying mantis (Mantis religiosa) and European Peacock (Inachis io). The lake and the surrounding reeds provides nesting and resting place to one of the richest bird population in Budapest. Also in the 150-hectare area includes the neighboring forest of Cinkota with its sandy grassland remnants.