The World Heritage property extends 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 the Baroque layout 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. The surviving Baroque water structures built by Landgrave Carl are supplemented by the Romantic features, including waterfalls, the Aqueduct and the Great Fountain, that were added by Carl's heirs and successors. As well as the Hercules Monument and the water features, the highlights of the ensemble, which is without an equal in the world, include the mock-medieval castle of Löwenburg and the stately Wilhelmshöhe Palace with the nearby Ballroom and Great Greenhouse. The park also features a large number of small structures and follies.