On 23 June 2013, the gesamtkunstwerk of Wilhelmshöhe was listed as a World Cultural Heritage site by UNESCO's World Heritage Committee, an act that distinguished it as a cultural landscape that is unique in the world.
The World Heritage property is about 560 ha in size, extending from the famous Kassel landmark – the Hercules Monument – via the 350-m Cascades down towards Wilhelmshöhe Palace and beyond it along the visual axis of Wilhelmshöher Allee.
The foundations of our unique Baroque monument to European architecture and garden art were laid towards the end of the 17th century under Landgrave Carl (r. 1677–1730). In the late 18th century the park was expanded and converted into a Romantic-era landscape garden inspired by English models. Landgrave Carl's Baroque water features have been preserved by his heirs and successors, and supplemented with the Romantic water features – waterfalls, the Aqueduct and the Great Fountain. In addition to the Hercules Monument and the water displays, the highlights of the ensemble, which even today is without an equal in the world, include the mock-medieval castle of Löwenburg and the stately Wilhelmshöhe Palace with the nearby Ballroom and Greenhouse.