Pilis Biosphere Reserve is situated to the north of Budapest, bordered by the Danube River to the north and east, and by the Vörösvár Valley in the southwest. Geologically, the territory comprises two parts: the eastern and southern areas are part of the sedimentary rocks of the Pilis Mountains. The rest belongs to the volcanic ranges of the Szentendre-Visegrád Mountains. Dense oak and beech forests almost completely cover the area. The biosphere reserve is a popular recreation area for visitors from Budapest. Apart from tourism, agriculture and forestry are major economic activities in the area.