Babelsberg Park is a 114 hectare park in the northeast of the city of Potsdam, bordering on the Tiefen See lake on the River Havel. The park was first designed by the landscape artist Peter Joseph Lenné and, after him, by Prince Hermann von Pückler-Muskau and Karl Friedrich Schinkel, by order of the then-prince William I and his wife, Augusta. Located on a hill sloping down to the lake, the park and castle are part of the Palaces and Parks of Potsdam and Berlin, which were inscribed on the UNESCO World Heritage List because of their unique architecture and testimony to the development of landscape design.